Having lived in Tokyo for 11 years, I am familiar with authentic sushi. This place isn't about authentic sushi, it is about Californian sushi. It is a trendy place and as a Dominic mentioned, a great place to take a nervous eater.
The place is pretty, counters and bars clean, and the staff all able to speak at least a little English (even the chefs to be polite). That doesn’t help with the fact that while the foods appearance and presentation are “exceptional” as noted by the self-promotion, the prices are similarly high class. My standards are probably skewed by California, where I had some authentic “sushi dining” as they call it, but more for your money isn’t exactly common in Japan. I just felt disappointment, I guess. For Japan, I suggest sticking to Japanese-style sushi. While the taste is nostalgic (the use of cream cheese and asparagus and the actual existence of sushi rolls!!!), it isn’t excellent, overwhelming, profuse, or anything that would bring me back. Plus, the environment feels a bit too…. uncasual. Business suits galore and all that. The food menu is even withheld originally so that the customers can get full perusal of the drink menu. With the portions I experienced, I’d say expect at absolute minimum 2000 yen for semi-full.
I guess what I’m saying is if you’re budget or if you’ve had rolls in Cali or anywhere U.S., this place necessitates full on avoidance.
Rainbow Roll is a glam sushi place where you could take the more nervous foreign eater. There are plenty of delicious fusion style rolls on the menu and it's open for lunch or dinner. http://tokyoeater.blogspot.com