I had so much fun with this. It’s not more or less than it promises - it follows a bunch of bad people through their summer, and there’s a bit of a mystery that imo isn’t all that important but is fun to wonder about through the book. Everyone is the worsttt but in a pretty fun way. I do think the book is a little harsh on the unmarried woman character in a way I didn’t appreciate a few times, but she’s the worst too, so it doesn’t feel totally inappropriate. 
cw: if infidelity is a no for you, definitely don’t pick up this book. The majority of the bad behavior is from cheating on spouses.