Tried out Chatime in London a year ago so I was juiced to see one here in Toronto. Through searching Yelp, Chatime seemed the most promising bubble tea spot. I ordered the mango green tea with boba and it was pretty lit. Well priced and it did it's job. I love the option that you can choose the sweetness and ice level.
The structure of the location is very narrow and tight, so chances are your butt will be in front of someone's face 75% of the time.
If you're in the mood for boba, I would recommend Cha Time.