This is one of the best books I've read. The subject is fascinating, the characters are engaging - particularly Mark Watney. I had to regularly remind myself that this was not a retelling of actual events and that these people are fictional.
I won't lie, I did tend to zone out a touch during some of the longer scientific passages but they only made the story feel more real. I can only imagine the insane amount of research that went into this book.
In addition to the fantastic writing, the extremely engaging story, and the great character portrayals, the narrator did a stellar job of bringing it all together.
I highly recommend this book to everyone.