Chez Bong is probably the best Korean Restaurant in Montreal in my opinion. It's always fairly busy inside and they always have K Pop littered on the TV's for your enjoyment. The service is pretty good and the food is authentic down to the chef and owner who's usually in the back swamped with orders. It's easy to get a table and your food usually comes out pretty quickly.
I've had a few things here including the bibimbap, soy bean soup, seafood soup, korean bbq dishes and even the soju. Everything also always comes with a nice selection of side dishes and sometimes they give you free soup as well. The food is very tasty and on par with some of the best places in Toronto. I would say the portions are a little smaller than I would like, but the quality definitely makes up for it.
I really enjoy this place and would definitely be back when I'm in the Chinatown area. It's located downstairs beside the jewelry store, so it's a bit hard to find. A great find if you're in the Montreal Chinatown area looking for some Korean food!