As has been said below, it's a hole in the wall. But with so few options in dorval, it's definitely worth dropping by! Also, finding small, lost but delicious restaurants makes me feel like I'm part of a secret sisterhood. So if you're into that...
The restaurant itself is fairly small, but it's clean and had strong AC on (which was much appreciated on a warm summer day). Reasonably priced, authentic Mexican food. The woman behind the counter was kind and whipped up my food in about 10 minutes. The servings were big (although I'm a 21 year old girl so perhaps a bigger dude would have to order an appetizer too?). I had a soup and a chicken fajita and my friend had the chorizo chilaquile. The soup was a huge portion definitely for two minimum.
I recommend picking up the food and going to the dorval waterfront with it all on a nice day.