I had a moment of utter confusion when I first came to Sherway Gardens and tried to find Starbucks. I knew they had a store here since it's on their website and people walked around with their cups. But when I looked at mall map... nothing. I even walked around the ENTIRE mall in search of it. I couldn't find it... I ended up going to Second Cup (which is just as good and Canadian).
Turns out the reason why I couldn't find it is because it's INconveniently OUTSIDE the mall but 'attached' to the physical building. The only way to access it is to walk out the mall and voila, order to your hearts content. Due to the fact it's outside, it has less traffic than Second Cup so it's easy to get an espresso drink without waiting.
Service is quick and efficient. The cappuccino wasn't bad but certainly not the best. Average fare for mall coffee. So if you're desperate for Starbucks, trek outside. Otherwise, you have choices inside the mall with Second Cup, Michel Baguettes, Tim Hortens, and Faema that are more conveniently located inside.