This is an ok place to eat if you've got time to kill at YUL before a flight. I wouldn't eat here if you don't have at least 45 minutes to spend.
I've had breakfast and dinner here. Both times service was pretty good. Breakfast was bland and not the best. Dinner was a bit better, I had the onion soup which was very good, and the salmon burger with salad which was not bad. Prices are on the higher end for restaurants at the airport.