Working in the area, I've tried almost all the BBT stores at Commerce but CoCo is my ultimate favourite and I will choose it over the other ones in the plaza. The average drink is about $5.00 which is standard (and cheaper than Alley in the same plaza).
I think this is the smallest CoCo I've ever been to but they are fast in prepping your drinks so it works out. There is no seating at this location. Service is always great here and they don't mind having to look up my phone number if I don't have my Vicinity card on me (I've had someone tell me they can't do that before at another BBT store).
My go-to drinks are either the Sago Milk Tea or the Taro Sago Milk Tea if I'm feeling for something more sweet. I dislike tapioca but I enjoy having sago in my drink. The milk tea is very smooth - just the way I like it.
Note that it can be hard to find parking in this plaza, especially during lunch hour and dinner time. I prefer to walk over with my coworkers on my lunch.