As far as take out sushi goes (of the sushi-shop style variety that seems popular in Montreal) this is one of the best. Cheap and generous portions (especially the lunch specials, holy cow they are great) and they commonly throw in an extra piece or two. As far as the actual quality goes it's quite average, not very fresh but definitely better than most quick takeout sushi places.
One thing, make sure you get the order fresh, not from the fridge - it makes a big difference.