Overall, I think Roll N Bowl is very average with decent food and friendly service. The restaurant falls short in that it doesn't nail either the Korean or the Japanese cuisine it offers. The dynamite roll I ordered, although good, fell apart easily while picking up. As for the Korean food, the bibimbap wasn't anything memorable, while the side dishes were okay with the kimchi needing a bit of work. I would go again, but I would prefer the competitor across the street if I wanted to eat a similar cuisine.
Also, I went during a busy dinner service where the restaurant was packed. The service was a bit slow at times, but nonetheless still okay. Roll N Bowl would definitely benefit from hiring an extra waiter.