I saw this thursday night. I'm not always one for comparisons, but IMHO it blew Interstellar out of the water.
Totally agree. But then again I never thought much of Interstellar to begin with. It really doesn't belong in a discussion about good space movies, or even good movies, to begin with.
For me, Martian is up there with Apollo 13, 2001, and Marooned.
Destination Moon would be in there too for the hard SF, but the movie itself suffers from 2D characters and script writing, so it doesn't make the cut. Gravity almost makes the cut for great visuals, story, and localized science (EVA scenes and space vehicle details very realistic), but loses for global science failure (Kessler Syndrome does not work that way, objects in LEO don't all line up nicely so you float to them in a suit, etc.).
Interstellar is in my doghouse with Armageddon as far as bad space movies go.
But I put The Martian near the top. Now, after we pick it apart on OF, we'll see if it stays on my Top Win list.