I've passed by Patati Patata for years and it's been on my bucket list for a long time. There's always a line up and it's worth the wait ( coming from someone who doesn't do line ups). We decided to stop there on a Saturday for lunch and were quite satisfied.
I had the burger with a classic Poutine and asked to add mushrooms. The Poutine was really delicious and the fries were tasty and crunchy. Their burger too was delicious. You have the option of adding fries and salad with burger as well as replacing your fries with a Poutine. As well, you have the option of customizing your burgers. I hear the Patitine ( Poutine with onions, peppers) is supposedly really good so if you feel adventurous go ahead with that.
For an extremely reasonable price each person can eat for under $10.
The staff is super friendly and very accommodating. We were lucky enough to sit by the big window and enjoy the sun and people watch. Overall great experience and I will be back.