First, a warning: There is not a lot of plot to this book -- you are over 100 pages in before the story really starts. People who like SF seem to get frustrated by the amount of metaphor in this book (even though all great SF is metaphor on some level). People who don't usually read SF seem to get frustrated by all of the SF tropes. And if you don't like metafiction, stay away.

I liked the book, though. I thought time travel as a metaphor for aging was an interesting idea. I enjoyed the humor ("The woman I didn’t marry is named Marie.... I suppose technically you could make the argument that every woman is The Woman I Never Married. So why not call her Marie, that was my thinking.") I thought the human characters - the narrator, his mom, and his dad - were touching. And the moral of the book is a good one.

This isn't a book for everyone, but if you are up for a slow-moving, thoughtful meditation on life, I'd recommend it.