Qing Hua is definitely one of the best Chinese restaurants in Montreal and in terms of dumplings I doubt you will find a better place to go. Though a small restaurant I've never really had a problem getting a seat, even around lunch time, and it's always a relatively pleasant experience.
The only thing to really be sour about is the service which I thought was lackluster. We ordered our dumplings and were promised soup since that is an integral part of the meal but we never got it...That's a damn shame. Thankfully this did not happen more than once. Even then though the service is relatively slow and to get a seat is sometimes more of a pain than it should be.
The dumplings though are exquisite and are both juicy and flavorful. I usually order the pork and cabbage ones; half fried and half steamed. It's always excellent and the price is perfect. I've also tried the pork and coriander ones and these were excellent as well and somehow strangely refreshing.
Overall, this is a place definitely worth checking out even if you are not a fan of Chinese cuisine. Dumplings are easy to get into and enjoy and there is no reason you won't like eating a lunch at Qing Hua. Given how low the prices are it's definitely worth giving a shot.