Roll N Bowl appears to be a small family-run restaurant, and on my visit, I'd say I was a bit disappointed given all the good reviews I've seen.
The service wasn't terrible, but wasn't that great either. The waiter didn't seem to know what he was doing half the time. Also, no complimentary dessert here as is common practice at most Japanese restaurants of this type.
The food itself was hit-or-miss. The shrimp yaki udon had lots of shrimp, but was extremely salty (caution to anyone that's trying to keep their sodium intake in check). The aburi (pressed) sushi wasn't "pressed" that well, in the sense that it would often fall apart when picked up with chopsticks. The fantastic roll was pretty fantastic, though initial impressions from the presentation weren't that great since it was covered in gooey sauce.
All in all, there's a lot of room for improvement! Hopefully after a few months I can revise this review.