Saw this in 70mm IMAX over the weekend at the Universal Citywalk theater, which I would recommend if you are in that area(Im talking about Hollywood btw), and like typical Nolan, it was amazing. Was on edge throughout the entire movie, and Nolan really nailed the survival aspects the characters were going through. Phenomenal direction, huge scale, great cinematography and great performances all around, and an awesome score. My only flaw that keeps it from being one of my favorite Nolan films is I didn't have an emotional connection with anything in it. I know that's what he was going for, but it still prevents it from being one of my favorites from him. One of the years best films and I hope this finally gets Nolan his first oscar nom, he deserves it.
I'd rank his films like this
1. Dark Knight 10/10
2. Inception 10/10
3. Memento/Batman Begins 10/10
4. Interstellar 9.75/10
5. Dunkirk 9/10
6. Insomnia/The Prestige 8.75/10
7. He Who Shall Not Be Named 6/10