First off, dinner is $26 and the fish to rice ratio is AMAZINGGGGG! I think I've only had that kind of ratio in Cali (have not been to Sakana since apparently they own that, too).
My friends mostly complained that the fish (literally everything I guess) tasted super cold. And it's not suppose to be served that cold.
Other than that, and the somewhat slow service in terms of some foods coming out, I enjoyed myself. It's probably cus I'm not going to be eating 50% fish and 50% rice. I had more fish than rice so that always makes me happy. I would definitely come back.
You can request fresh wasabi. The wasabi they provided us were very minimal so you'll probably have to request for more like my friend had to.
They do charge for hot tea, FYI. Try their trout nigiri. I believe that was one order per person. No limit on mochi ice cream :0D.
The staff is definitely friendly and they seem very attentive, too. My hot tea was practically always full and in other places I have to struggle to get it refilled.