I thoroughly enjoyed this read. It's Vonnegut, my favorite author as a teen whose books I still enjoy, writing an autobiography wrapped in fiction. I loved the tone of this book, leaping from cynicism to feel-good catchphrases. The central conceit is that there's a 'timequake' that boots everyone back in time, but they have to repeat everything that happened exactly the same way - and then it ends, and they have free will again. It's a really good device to think about life.
I like Vonnegut's writing a lot, but I also like his approach to life because it feels familiar. He's kind of a naturally impatient, unsatisfied, or sad person who wants to be happy and is able to be happy with some concentration, effort, and intentional wisdom. Here's an example from the book:
I gave advice, too. I said, "My uncle Alex Vonnegut, a Harvard-educated life insurance salesman who lived at 5034 North Pennsylvania Street, taught me something very important. He said that when things were really going well we should be sure to notice it "He was talking about simple occasions, not great victories: maybe drinking lemonade on a hot afternoon in the shade, or smelling the aroma of a nearby bakery, or fishing and not caring if we catch anything or not, or hearing somebody all alone playing a piano really well in the house next door. "Uncle Alex urged me to say this out loud during such epiphanies: 'If this isn't nice, what is?'"