I haven't read a pure science fiction novel in a while and this one was quite well done. Short chapters, great characters and an exciting plot made for a fun read.
I won't go into the plot but can say that it does have some icky bugs in it. There's a lot of NASA stuff going on and if that's your thing, you'll have fun with that. I found myself wanting to keep turning pages with the crisp narrative and fast-paced action that didn't drag. Short chapters that were easy to read, even during commercials made this thick novel a great experience.
The story also ended well and that's a big plus for me. I didn't have any problem with either the science, logistics or any of what happened, though I'm no expert and I'm sure anyone intimately familiar with the reality could probably pick all kinds of holes in it.
For me, it was worth the price of admission. Highly recommended.