I'd been going to Mandarin since I was a child. Although I have been to almost all locations in the GTA, I must say that this location has always been a favourite.
I never expect much from buffets, as almost all that I have ever been to have been displeasing, however, Mandarin has always been my favourite!
The food is fresh and plentiful with many varieties. Sometimes there is a variance in quality of food, which I assume is affected by how busy the restaurant is (and it is typically very busy).
For the amount of food you eat, and the above average buffet quality, Mandarin is always a treat.
Of course, you cannot expect fancy, over the top fare here. But for affordable and good food, you cannot go wrong.