This milkshake is sure to bring all the boys (& girls) to the yard, as the song goes! It's good, nice sizing, two classic flavors (vanilla and chocolate) to choose from. I think that applies to the short menu as well: they offer few choices, but they prepare them well. I had the single patty Uniburger with added fried onions (0,50$) and bacon (1,50$). I can't think of anything specific to complain about. However, I felt less satisfied with my meal than when I pick-up from Five Guys. Still, the two are quite similar.
In spite of the fact that the location is tiny-tiny, the decoration is thoughtful. I bet that next summer, it will grow more popular as people are often interested in grabbing something to eat prior to a lazy afternoon in George-Étienne Cartier park.