This place is fiya. My friends and I go to AYCE sushi places around downtown MTL so often that we're on a first-name basis with some servers. I've tried most options in the area, and as far as AYCE buffet goes, K2 is hands-down my fave. Higher-end decor / atmosphere for an AYCE place, the service is faster than most other places (and more friendly), and the selection is pretty good. K2 is not all of my friends' favorite AYCE sushi restaurant, but it has some unique choices like pumpkin soup appetizer that I personally really like.
I mean, it's an AYCE place so don't be expecting too much. But as far as all the other AYCE sushi options go, this is one of the better ones.