Hi abe_froeman,
I'm familar with the GroupOn Twisted Sushi class. My wife bought the class for me as a gift. She had once before bought me a class from Patrick Chabert, in Wheeling...it was excellent!
I made it to the Twisted Sushi class a couple of weeks ago, kinda. It's located in a large wharehouse building, that is actually a decent sized kitchen for rent per event. They overbooked us, my friend and I had absolutely NO room to do anything...I'm not sure what had happened with the schedule. We asked if we could come back at another time which didn't seem to be a problem.
During the time I was in the kitchen I was paying attention to what was going on. I'm not sure what the level your looking for...but what I saw was a complete disappointment. I was hoping to really excell my sushi into another level. They were making rolls with precooked chicken out of a store bought bag. Need I go further?
It did however look like everyone was having a great time though. I suppose it's all what you're looking for.

,
dan