Great sushi in a chill setting. The fish is very fresh and there are usually delicious specials to try. Also, try the sake boxes - not sure on the proper technique for drinking out of a square wooden box but it is more fun and smooth.
let me say that i far prefer blue ribbon to nobu because everything is to die for and falls apart in your mouth, yet the menu is relaxed and cooking is facile. the cool low-key ambiance and hidden entry are big pluses.