Decent place for dim sum. The cart experience needs to be refurbished. The place is big and not many carts pass by. You often need to get up and pick yourself your dishes. Waitresses are stressed, they really need some help.
There's a buffet place but with many people out there it is kind of messy.
Price is good. I've ordered a lot of food for 3 people and we paid $40, tips included.
As there's just one other dim sum place in Montreal, I would say it's ok to go to Ruby Rouge. It's subpar compared to Toronto.