There is one crucial deciding factor on whether you will find this book charming, annoying, or somewhere in the middle. The story is domestic drama, the big and small problems that happen among families and friends. What will clinch it for you is the setting, which is in a lot of ways the entire book. ALL ADULTS HERE takes place in a little town in New York a short train ride from the city. It is small and quaint, everyone is kind and quirky, its main street is populated with the same locally owned shops that have been there for decades, everyone has plenty of money, and generally everyone is happily, kindly, thoughtfully progressive. It is that imaginary happy valley liberal bubble people imagine when they think of this kind of town. If that sounds like a place where you would like to settle in and spend some time, or if it sounds like a place you wouldn't be caught dead, well that tells you what you need to know about how you will relate to this book.
For me, it is extremely middle of the road. It is probably lucky I read it on audio, which hits a different part of my brain, and happy distractions are better received while I'm doing dishes or driving. It is a happy book, a book that wants to be comforting and affirming. Even though there are problems and people making bad decisions, it wants to be wholesome and sweet and make you love its imperfect people. And it is pretty good at that. It's just a question of whether you can accept the entire venture. (I am still totally unclear on why anyone moves back there after college. But then again, I am still totally unclear on how almost any of these characters actually make money soooooo)
I enjoy books where several characters interact and we get to see things from all the different points of view. This book does that really well, definitely its biggest strength is the way it moves you through these characters and makes you sympathize so deeply with all of them even as they don't always sympathize with each other. As much as other things bugged me, I still found it a well-executed happy little book. I just don't actually read all that many happy little books because I am a heartless void.
Outside of the general squeaky clean-ness, I got hung up on two things. The least 13-year-old 13-year-old perhaps to ever exist on paper and the made-for-tv-movie trans character storyline. I was mostly just baffled by young Cecilia, who is shipped off to her grandmother's house and who does not mope or get mad or rage or constantly dump on small town life as someone raised in Brooklyn. She just is a bit sad and frustrated and otherwise takes it on the chin mostly. She also gets the same meditative ruminations as the adults, which always strain credibility--none of us think thoughts that clearly, but if you can suspend disbelief it does show you how wise the author is--but all of which seem to have far too wide a scope and perspective. My hackles were up at the trans character's storyline, as they almost always are, because when this is a secondary plot in a cis-writer's book, it always means you have to brace yourself. It is never full-blown bad, but I do not think it was all that good. Very oh-we-all-love-each-other-of-course-we-accept-you-and-wow-you-are-so-beautiful stuff, and notably the character's coming out relates mostly to a cis character's growth arc, which is typical but still depressing. (The character is referred to mostly by the name and pronouns they were assigned at birth, which kind of makes sense as the character is not out and still uses them, but we so rarely have the character correctly named and gendered that it rubbed me wrong.) Other reviewers here have noted that parts of the plot feel like checking boxes of "important current topics" which I can see, but most of them didn't bother me all that much, while the trans storyline definitely felt that way.
It's definitely a rohrschach test of a book, either a perfect beach/plane read or one you'll toss across the room. But it'll say just as much about you as it does about the book. (Shout out to the heartless voids!)