Hmmm, I've read the book, was looking forward to the movie, now I'm not so sure.
The book was excellent IMHO, I have a very vivid imagination and got completely lost in it to the point of staying up late one night to finish it.
I'm not super picky about movie versions, but I like to have a reasonably close resemblance to the story line and the action. I can tolerate a bit of license with the physics if the rest of the movie at least entertains well but now I'm wondering ...
I'll go and see it if only to satisfy my own curiousity. I guess it will be a bit like 'Gravity' which took a fair few liberties with reality but I enjoyed anyway.