I got bored about halfway through. I thought the narrative was very wordy and that losing around 100 pages wouldn't have damaged the story. It picked up towards the end though and while I predicted the eventual ending, there were a couple of twists along the way.
I really enjoyed the different medical scenarios from penis enlargements to cancer to genetic disorders to placebo treatments and how they were interwoven together and only really appreciated how much I'd enjoyed it after I'd finished the book.