I enjoyed it!
I find John Irving has very particular style and I like it, so that helps. The book is definitely more of a journey-type rather than destination-type book if that makes sense. I enjoyed that the author used the book to explore various facets of American politics throughout the main character's life. I'm not American, so maybe Americans would know more about that?
If you enjoy this book and want more, you could always read "A Prayer for Owen Meany" by the same author. That one is so good!