Ten Ren's seems like one of the "go-to" places in Yonge/Finch (or Empress, if you're going to be more specific). I used to go here a lot before the other little restaurants started popping up. Don't get me wrong, the food here is great. I love their Taiwanese cuisine there. However, I find their bubble tea wayyyy overpriced comparatively speaking to the other places in and about Toronto.
Service-wise? I'm not too impressed. People there are a bit rude.