If you go to a restaurant primarily for nice decor and a trendy atmosphere, then by all means, head for Sushi Rock. Personally, I go to a restaurant primarily to EAT, so the food has to come first. At Sushi Rock, the sushi only comes first in their name. It's a stretch to even call it mediocre. If you've ever had even halfway decent sushi, you'll be disappointed. Neither the fish nor the rice were fresh, and the rolls were inexpertly prepared and falling apart. The sake selection was just sad.
It wouldn't be a bad place to go for drinks, but it would only get me craving GOOD sushi and I would leave disappointed again, so I'm not going to bother. Next time I'm craving Japanese food, I'll head for Pacific East in Coventry.