We went to SumoMaya on Saturday night, so it was fairly busy. The food was very good and most dishes ranged from $10-$15 with a few closer to $20. I had the eel and avocado roll and the ramen - both of which were very tasty. My husband had the suzuki roll which he said was good, but a little on the bland side.
In terms of atmosphere, they had a DJ playing which I found to be a little loud. I'm sure there are plenty of people who go for this type of experience, but it's just a personal opinion of mine.
The downside for us was that all of our food came out at different times. We were a table of 6 and ordered our meals all at the same time. Dishes began coming out of the kitchen and there was probably a 20 minute gap between the first and last dish. I understand that they have a sushi bar and are a fusion restaurant, so likely have multiple kitchens that food will be coming from, but it was a little strange to have one person completely finished with their meal before someone else even received theirs.