Sub par sushi.
Ra was the first place I had ever tried sushi and I really enjoyed it. However, after broadening my horizons and dining at other sushi establishments (Hiro, etc.), I discovered that there are much better options all over the valley.
If you go, I would recommend the Las Vegas roll (not sure what's in it) and calamari roll (fried calamari, cream cheese, white rice, and topped with eel sauce and tempura flakes). Both are decent and are much better tasting than their other rolls.
They have good happy hour deals. Rolls are definitely much smaller here than anywhere else I've been.