I've been to shanghai dim sim on multiple occasions and I've always enjoyed the food here. I'll only review breakfast today.
They offer a special before 11am and you can order some traditional Chinese breakfast items for $0.99 and a select menu for 20% off. There is your typical soybean milk (sweet/unsweetened), fried dough fritter, steamed buns etc. Their dough fritters are fried nice and crispy, without being too oily. You can tell they fry it fresh, because it always soft and piping hot. They soybean milk is the just the right amount of sweetness but I always have to ask it to make it hotter. The little wonton soup, is not your typical cantonese wonton soup. These are bite-sized wontons, with no shrimp filling but it is served in a seaweed/shrimp broth. It's a light dish meant to accompany your morning meal. There is glutinous rice filled with fried dough fritter and pork floss. The rice was sticky and soft and plenty of pork floss. It was a good ratio between rice and dough fritter as well.
Lastly, I will definitely recommend the soup dumplings (xiao long bao). I believe this is one of the best I've had in gta/toronto. The dough wrapper is thin but still kept the delicious juices intact. Yum :)
I've never had a problem with service, however I do speak cantonese and mandarin.