I went to high school nearby so I grew up at Mister Jerk so I admit I'm a little biased, however for the price, I haven't found many places with better Jerk Chicken.
I just got back from Ochos Rios Jamaica, and had asked a cabbie to bring me to his favourite roadside drum jerk chicken. And honestly, that was THE best jerk chicken I'd ever had, especially with the Jamaican Ketchup and hot sauce. So if that's my measuring stick, Mr. Jerk's chicken is honestly not that far behind.
I also love their Curried Oxtail and Jerk Pork. The sauce is really the key.
I think the two Mr. Jerk restaurants in Toronto (the other one is located at the Peanut Plaza on Don Mills Rd, north of Sheppard) are run by a Jamaican Chinese family, as I found it quite amusing to see Asian people with a thick creole accents, even though I know there are alot of them in Toronto.
Both places are not a sit down restaurant and only wished they had a drive thru window! :)