If you live in downtown Montreal, you will need to get a car to drive there. Public transportation will take you for ever. The outlet is nice and clean. You can find there well know brands at discounted prices that you can't anywhere else. I posted a picture of the store directory( ex: Gucci, Ferragamo, Max Mara, Lacoste, Polo). In addition, you can find the usual brands like CK, Nike, Adidas, Mk. Sometimes you can get discounts on top of the actual discount. Yes, it's amazing !
I go often there. I am always satisfied.
Expect to spend there several hours. Therefore you will find the foodcourt very useful to grab a quick bite and rest. My favorite is Zouki's and Beignes D'Antan.