Oasis has always been one of my "go-to" places for hookah/shisha after a great tasting Middle-Eastern meal. I have been going to this place for about 7 years now.
Before the Ontario law banning smoking indoors went into effect Oasis used to use the real tobacco and smoking would be indoors as well as on the patio outdoors. Ever since the ban, smoking herbal tobacco indoors has been lame. I wouldn't blame Oasis for their hookah quality decreasing. During the summer it's very nice to sit outside on the patio and have shisha along with their Oasis special juice cocktail.
The food here is pretty good. I would definitely eat the food here although over the years the taste has changed. It used to be great tasting but now its only good. The service here though has dropped a lot. I don't know why but there are only 2 waiters working at a time even though it gets really busy on the weekends.
All in all, it's a good time-pass place with good food and shisha. The fries with hot sauce are amazing. The shish tawook sandwich is really good although at times it doesn't taste the same as the last time. They have the non-alcoholic beers that are flavored and their katayef (dessert) is amazing.