It's not bad. I wouldn't really call it a movie, so much as a collection of un- or only tangentially, -related Zombieland sketches. Many of these things are amusing. Except the best new thing about the movie is the one the characters are determined to shit on. I'm not super-fond of Jesse Eisenberg playing anyone but Lex Luthor. That was a really good performance, and people who want to bitch about his twitchy and erratic behavior, while ignoring what Gene Hackman and Kevin Spacey actually did on the screen, can eat it. But in this sort of movie, he is pretty horrible as Columbus, ostensibly an everyman protagonist, with whom we are apparently supposed to identify, but actually just a self-absorbed little shit. The film gets some good mileage out his main trait of keeping a list of rules for surviving the zombie apocalypse, by animating them, but the real show here is Woody Harrelson's character, Tallahassee. Anyway, the quartet from the prior film, Tallahassee, Columbus, Wichita & Little Rock, decide to move into the White House, and spend some time playing with various pieces of American history and Presidential memorabilia. Little Rock, however, grew up (and Abigail Breslin had to temerity to not grow into an approved Hollywood shape, so her screen time is reduced and she is stuck in outfits that seem less about being practical for a zombie apocalypse, and more about trying to make her normal woman body as sexy as possible), and isn't happy about being in a world where the only eligible men are her father figure (who is more enthusiastic about that role than she is) and her sister's romantic partner. By the way, it's been a long time since I saw the original movie, and I have no idea why they are named after cities in different states if they are sisters. But anyway, Little Rock's issues lead to a road trip, to a similarly frivolous destination as in the last film. Along the way, they meet other survivors, Madison (Zoey Deutsch), Nevada (Rosario Dawson), Albuquerque (Luke Wilson) & Flagstaff (that guy in all those Verizon commercials & the new Godzilla). As I said, it's amusing and fun, if you don't think too much or consider how the film sells out the story of its preqdecessor, by essentially having the same plot and undoing aspects of the characters' growth to make it work.

Spoilery nit-pick
There's a bit of hypocrisy in how Tallahassee, Columbus & Wichita treat Madison. Because it's a comedy, I'm not sure if the narrative agrees with them, or if the joke is that they are secretly jerks, but I can't see that the story is doing much to show they are wrong.

Madison has apparently spent the decade or so (the apocalypse happened before anyone had heard of Uber)hiding out in a mall, using the freezer of a food place as her secure dwelling. She dresses and talks like a ditzy valley girl and the others seem to hold her in contempt and consider her stupid. She uses pepper spray as her primary weapon, as an example of her stupidity, and Wichita sneers at her for not assuming nuts are an ingrediant of trail mix. She wears high heeled boots by choice, and the girl version of a track suit, but it's fuzzy & pink, so she clearly sucks and does not deserve to live. She also wears makeup, but so does Wichita, and as mentioned above, Little Rock's clothing is no more appropriate for a zombie apocalypse. At least Madison's garments cover more skin.

But a staple character of zombie apocalypse fiction is the squirrelly loner, who has survived for a long time on his own, with a variety of off-putting habits and bizarre coping mechanisms. It just so happens that Madison's behaviors match a personal style it's fashionable to revile. Except Zoey Deutsch has no more than a couple of years on Abigail Breslin. Which means she too would have been a child when things broke down, and she survived all this time without a big sister looking out for her. It's supposed to be contemptible that she uses pepper spray, but firearms skills are not exactly easy to come by, to say nothing of the guns themselves, especially in the vicinity of left-wing bastion Washington DC (where she has spent the apocalypse). I personally dropped in to a local firearms retailer & gun range which is clearly run by gun nuts. Not enthusiasts, nuts. In the lobby is a display, the centerpiece of which is a motor scooter, armed with twin machine guns. The logo of the range is the name "Guns for Hire", and the letter "I" is fallen forward, lying in a pool of blood, with a bullet hole in the dot. These are not people remotely embarassed about guns or the associated violent reputation. And the process of renting a gun and shooting one is so tedious, rule-constrained and safety-conscious, not to mention a multi-day procedure that I have yet to actually fire a gun in my life.

Marksmanship & firearms are not the sort of skills or equipment the average young girl will going into a zombie apocalypse possessing. So, yeah. Irritating & blinding a zombie, to allow yourself time to evade its clutches, is not the worst tactic ever. It is already established that they depend on normal sight, rather than smell or heat or bio-electric whatever, since a good zombie make-up job can fool them. Also, pepper spray doesn't have any recoil or weight to speak of, which is not an insignificant detail for a slightly-built young woman. Another issue is that if Madison didn't have a particularly outdoors-oriented lifestyle, and the typical hide-anything-remotely-dangerous-from-the-childrens'-knowledge parents of the 21st century, it is entirely possible that a pre-teen girl might simply never have known that trail mix usually has nuts.

Granted, we don't see obvious survivor skills on-screen, but she manages to never get killed when apart from the company of the main characters, and just keeps on keeping on. They ditch her luggage, which is not much less than the other characters are carrying, except their are drab and utilitarian in appearance, whereas hers is a pink matching set (that has useful supplies, for all they know), and the narrative suggests it's the right thing to do, with a graphic quoting Columbus' Rule #7: "Travel Light." At no point does she complain about this, either, or many of the other discomforts of their situation, only a mildly annoyed comment that Tallahassee & Wichita can be rather unpleasant (after several minutes run time of both of them treating her with utter contempt). When the group leaps to the conclusion that she's turning into a zombie and try to put her down (she survives due to them not being good at recognizing the symptoms despite a decade into the zombie apocalypse, and Columbus being as pathetically inept as his sort of character usually is, and we're supposed to admire him for it), she doesn't hold it against them and seems genuinely pleased to be reunited with them.

It's not contemplated by anyone how this stupid ditz managed to overcome an anaphylactic reaction, back track to the last working vehicle she had encountered, and start it running and catch up to the badass heroes with their appropriate outfits. The start of Madison's relationship with Columbus is also framed as if it reflects badly on her (and not the supposedly awkwardly innocent Columbus who brought her directly to his bedroom), for basically initiating foreplay and then when Columbus goes through his nice guy routine (which, given any other demonstrations of genuine respect for women, such as when he's not trying to impress a nubile individual, I strongly suspect in such characters is actually a manifestation of insecurity and a means of attempting to avoid possible rejection by inducing the woman to make her interest explicit), Madison flat out tells him that she really wants to have sex, having finally encountered human males, and he is her choice by the very narrow margin of his age, but she's fine hooking up with Tallahassee. And a woman would have to be a lot more repellant or explicitly evil than merely the female equivalent of Jesse Eisenberg for a narrative to condemn a male character for sleeping with her after a decade or so without sex.

There's perfectly reasonable explanations for everything about Madison. Stop being misogynistic, Hollywood. Because that's what you're doing here. The only thing that makes her different from other eccentric loner characters is that her quirks are all "girly" stuff, without actually causing anyone problems.

Edit: It occurred to me, that this is a thing "Game of Thrones" has done to my thought process. After seeing them clearly discard the conventionally feminine character of Jeyne Westerling for an anachronistic woman designed to appeal to the sensibilities of a wide range of 21st century viewers, instead of a Westerosi nobleman, and seeing Sansa's conventionally feminine skillset shit all over, and the conventionally feminine Catelyn shoved into the background, and Cersei's worst attributes and actions sanded down or removed, leaving not much more than a conventionally feminine woman in a set of unusual and dangerous circumstances forcing her to rely on less than perfectly ethical means to avoid getting sexually assaulted or judicially murdered, while a writer-favorite character tells her she is the worst person they've ever met, and Arya & Brienne verbally trash their own gender at every chance, while becoming smirking homicidal thugs & their respective characteristic sociability and kindness jettisoned... I kind of think some feminists have a point! And it becomes the sort of thing you can't unsee. Gabbard 2020! (not really)