I've had dim sum in New York, China and Hong Kong and this is right up there with them. We went early on a Sunday morning and it as very quiet so can't speak for busier times but service was better than expected (and friendlier) and food was fantastic!
Not sure what other dim sum restaurants cost in Montreal but the two of us were stuffed to the brim for a mere $31. WELL worth it. We will be coming back next time we are in town.