It's a fine piece of film making, no question, but it's not an all-time great, let alone the best. It has a truly mesmerising soundtrack, and I adore its grounded sci-fi aesthetic immensly, but I find its story all over the place, and I'd be lying if I said I connected with any of the emotional stuff the film is throwing around. The ending isn't great either, and its downright cliche, given its genre.
For me, I'd rather Nolan jettisoned the "save the Earth" story completely, and just gave us a terrific space exploration story about astronauts going through a worm hole that just appeared in our solar system. The middle section of the film - from the time they leave Earth right up until the black hole nonsense - is fantastic, ruined only by the cuts back to Earth that just don't land for me at all.