I ordered from Mon Shing for delivery one night and I probably won't again anytime soon. I read reviews online about generous portions, but all I got was a takeout container that was around 1/4 full of only bokchoy and a few mushrooms, which was absolutely ridiculous because it cost almost $14. The food was okay, nothing special whatsoever. I also ordered rice, which tasted fine but you can't really mess up steamed rice.
My biggest issue with this establishment was by far their horrible customer service. When I get delivery, I always wait until my food arrives before I tip. When the man delivering my order arrived, he stood in the doorway and kept pointing to the receipt because I hadn't left a tip online. I was fully intending on tipping him, but was extremely close to just grabbing my order and shutting the door after what he did.
Overall, the food is fine and also extremely overpriced. The customer service is absolutely horrible. There are a bunch of Chinese restaurants in Montreal, so I would suggest ordering from one of those.