Lines can be a little long at times, but it's definitely worth the wait to try the hot beaver tail which can have many different toppings. We had the Beaver tail with cinnamon and it wasn't too sweet, which was perfect for our liking.
Note that they accept cash, at least that's how it was when we went. It didn't however look like they had a credit card machine though.
There are barely any tables available, so you'll have to eat it quick and go. If there were tables or seats available, the tables were at many times dirty. People should definitely clean up after themselves better. But as a business establishment they should definitely walk around during more frequently and wipe down their tables more frequently.
This place is located in Old Montreal, so if you're in the area, swing by and try one. It's a light snack; not filling at all.