Came here after I got my groupon with a friend for lunch. I was pleasantly surprised the south east valley had a sushi place with such a trendy ambiance. Prices may be a bit higher than other places, but you're paying for great ambiance and extremely fresh sushi. I ordered nigiri and sashimi, so I can't comment on the rolls they make. The salmon I had was buttery, and the tuna was fresh.
Service was fine for us at lunch, but I can see it would be slower at night being a new restaurant. Our server Heather was friendly and outgoing and refilled our drinks in a timely manner. I think given some time this place can work out the kinks.
It really depends on what you're looking for at dinner. It's more upscale than Kona Grill yet still having a relaxed vibe. I would consider the Sushi Room similar to a Stingray of the south east valley.
If I'm ever back in the area.. I'd definitely drop in for lunch again.