We saw it this weekend. I didn't hate it, but I have no pressing need to see it again.
The acting/writing is phenomenal. The action scenes are really well done. I was fascinated by the planets. The shots on those are incredible. The action shots are also really really well done and exciting to watch. The black hole is phenomenal looking and the science behind how they designed it is amazing and interesting. DH and I loved that the robots in the movie aren't anthromorphized, they're very utilitarian in their design, but have some of the best special effects in the movie.
However, there is no need for this thing to be 3 hours long. There are a lot of things that don't necessarily further the story that extend the time. After awhile, I was like, "Okay, any sci-fi fan has seen shots like this before, let's go". Also, I suspected and found out later, there are some shot-for-shot replications from 2001. I don't mind the homage, I mind that it was done for no real reason and just made the movie take longer. I see a lot of YAY female scientists and good science. Well, the female scientists were basically foils to the male characters in the movie and underutilized. Anne Hathaway's character had one moment that would've been marvelous, ruined b/c it was all about her lover and her arguing for love. B/c y'know that's what a woman would do. And just b/c the science is solid and good...well, that's not enough for a movie to me. I mean, yay that it made a pretty picture, but I already subscribe to NASA's photo of the day.
So, worth watching in the theatre, overall good movie, and don't pay for an IMAX upgrade like we did.