I just visited Koi today while in town seeing museums and from my experience it was just okay. The rolls were a bit dry for my liking, overall it was just so so. I also hope they pay more attention to detailed cleaning as they go. Service was a little slow, I ordered a tea upon being seated and she never brought it, mind you I was 1 of about 5 people. I ordered again with a different waitress.
I will not be returning solely based on my satisfaction of the sushi. Maybe I just had a random bad visit?.