Like most of the reviews that are posted here, I came during H2O's BOGO grand opening. Normal prices are $19.95 for lunch and $25.95 for dinner.
Interior: Very nice and spacious. I talked to the oner (I believe) and he stated that they are part of the same company Gen KBBQ is in Henderson, which explains the similar interiors. There are many booths and a bar to watch the sushi chefs make orders.
Food: You order by stating how many orders your party would like on a piece of paper. The server then takes this paper and places the order to be made. AYCE menu is very limited. I was very sad to realize that some of my favorites -- ama-ebi and uni -- were not found on the menu. Quality was average. Not the best I've had, but I could name a few restaurants that are similar in price range that have better quality sushi. Food came out slow and the portions were a lot smaller than anticipated. We had come about an hour of closing and they were out of a few things we wanted to order, though this was not something I would ding them on during their opening week. However, it would have been nice to have a way to inform the customers of what is not available before even placing the order to begin with.
Service: The staff was all very friendly and accommodating. However, it did take a while for my order to come (almost 30 minutes with only 4-5 other tables seated in the entire restaurant) and took just as long to get the check even though we were the last ones in the restaurant. However, I hope they will be able to fix these problems with time. It is opening week, after all.
Though I would give this place another shot, I don't think I would be driving out of my way to eat here. Hopefully by then, things will be running more smoothly.