Having lived in Montreal for over 2 years, I just recently went to Poutineville and it was definitely a place that I will make regular future visits to. I like to keep my poutines "classic", so I just ordered the regular cheese curds and poutine gravy, but I did order the smashed fries. The smashed fries are better than they sound. It is almost as if someone made fries...smashed them...and then fried them again. They are perfectly crunchy on the outside and make the meal everything you could ask for. For dessert, I had the choco choux, which was a chocolate cake with raspberries and ENTIRE cream puffs inside. I've never seen anything like it.
I love the fact that you can either pick something from the menu or you can build your own poutine. There is a selection of about five different gravies, few different kinds of cheese, tons of meats and vegetables. You can choose if you want a small or large portion which is convenient. Be careful though, with enough toppings you may end up paying way more than you planned. For those who are feeling a bit crazy (or have a large party), they offer a giant poutine which consists of 15 pounds of fries and more toppings than one could possibly eat. I had the privledge to see one in person just as I was leaving and the restaurant started to clap at its arrival.
The staff was polite and attentive. Will definitely be going back. Definitely one of the best poutine places in Montreal.
(Note that they don't accept AMEX!)