This seems like a popular chain in Toronto. Every time I come here, there are about 10 people in line at all times no matter what time you go. 10 people when I walk in. 10 people when I walk out. The shop is not very big but there are some seating available. There are 3 different sizes you can get - regular, large and super cup. I don't even know how you'd even hold the super cup since it's got girth. You can also specify the amount of ice and sugar you want (more, less, etc).
My favorite from here is the Taro smoothie with rainbow jelly. A large of this will set you back about $5.50. Pretty hefty for a drink, but seems to be the norm these days and it's pretty delicious. They do load it with tons of jelly, though.