Watched it last night in IMAX. The visuals were nothing short of breathtaking, the outer shots of equipment were definitely done with miniatures - a plus in my book - and the story was well engaging. I couldn't help but think though that this was little more than 2001: A Space Odyssey for the Post Kubrick cum ADHD crowd.
For a movie clocking in at over two and a half hours, many times it just felt rushed. The visual sequences such as docking, long shots of traveling through space and the like were, to me, a direct ripoff/homage to Stanley Kubrick's epic but it seems fewer and fewer people would understand that. The overreaching plot device did get me in a "huh!" moment but it didn't last long enough to make a solid impression. I don't say this often but this should have been a two- or three- movie epic. The extra time would have given The Brothers Nolan a better chance to flesh out their characters (and not just feel like basic plot movers for the protagonist) and those of us who remember 2001 would probably see less of it, in this.
My wife, who has not seen 2001, compared it more favorably to the premise of Star Trek. She felt that the use of theoretical physics, combined with a pre-apocalyptic situation that could be quite feasible, made the movie more engaging. She enjoyed the idea that this was something that could happen and that, give our species' ability to come up with dumb shit that works, the technology in the movie could very well be in our future as well.
All in all, I would recommend watching it. If 2001: A Space Odyssey is something you remember dearly, watch this on video. If not, see it in theatres. Without thoughts of Kubrick dancing in your head, the movie would be a wonderful spectacle.