The music is too loud, the sushi overpriced, and of uninspiring quality. I'm not sure what the draw is here. I could understand if it was the best option for sushi, but it's not. If you are happy with spending money on "okay", then come here.
...This is the vaguest review I've written. I can't think of anything concrete to say about Ra - good or bad. It is "meh" in every sense.