Working downtown I always welcome an alternative to the usual food court fare. Falafel Avenue's focus is on falafel as you might have guessed from the name and is an excellent option if you are in the McGill area. Prices are reasonable and the food is great.
There are a variety of falafels and they bake them which makes them healthier. You choose the ones you want and you can also choose between having them in a classic pita, sandwich, etc. You can also get a trio which includes a drink and choice of either fries, salad or dessert. My only complaint is that they were out of what I originally wanted and it was only the beginning of the lunch rush. I still ended up enjoying my classic pita falafel but they need to plan for busy periods a little better. Also the fries are pretty delicious.
The owner is very welcoming and even during a lunch rush he tried to make conversation with his customers. Prices are very reasonable especially by downtown standards. My lunch cost me less than $10 and the quality was certainly quite high for fast food.