Very swank and the food is as good as the atmosphere! While I'm not a fan of the raw stuff Yasu has plenty of other options. I went with five friends and all were equally impressed with this restaurant.
I found the service to be excellent, the waitress was very accomodating in answering the ad-nauseum questions from the annoying patrons behind me :) They wouldn't be considered cheap, but hey-it's raw fish so I guess I gotta butch up sometimes...