Moria gives it 5 out of 5 stars and says
In an era where box-office science-fiction is represented almost exclusively by superheroes and mass destruction spectacle, it is a genuine pleasure seeing a film that is rooted in solid science and high-concept science-fiction. We have a film that features such challenging concepts from physics as relativity, gravity and spacetime, time dilation effects, black holes and wormholes, which are a little more than the usual stuff that get served up to the popcorn bucket multiplex crowd.Empire Online gives it 5 out of 5 stars. Slash Film says, "As Interstellar ends, there’s no doubt you’ve been on a ride. A thoroughly enjoyable and memorable cinematic experience that’s well-made and acted." Rolling Stone gives it 3 1/2 out of 4 stars and praises "how enthralling it is, how gracefully it blends the cosmic and the intimate, how deftly it explores the infinite in the smallest human details."
Roger Ebert's site gives it 3 1/2 out of 4 stars and says the film is "an impressive, at times astonishing movie that overwhelmed me to the point where my usual objections to Nolan's work melted away." Rotten Tomatoes has a critics rating of 71% and an audience rating of 85%.