Ra is a great place to go if you're looking for a party-atmosphere to hang out with friends and have some sake. But be warned, if you're in the mood for authentic and fresh sushi and a relaxing atmosphere, this is not the place.
The patio, during the cooler months, is quieter and more enjoyable (and is a decent place to people-watch on weekend nights). They have a great bar if you're looking to socialize and have a few cocktails during happy hour.
The special rolls are good. I love their Ultimate Shrimp Tempura roll and their Ahi Tuna is good. However, the seafood is not as fresh as it could be. The prices are a bit expensive for only receiving decent sushi.
When you're traveling and don't know any local sushi joints, Ra is a reliable chain to go to.