This gets 4 stars out of comparison to other Starbucks and coffee places in the area. This is the Starbucks inside Treasure Island, tucked away towards Kahunaville. The lines tend to be much shorter here compared to the one located outside, and the staff pretty friendly. Also, if you're in Treasure Island already, you don't have to head out into 100+ degree heat to get your coffee.
Looking at the reviews, it looks like there were some mixed experiences customer-service-wise. Maybe I've just gotten lucky, but two years running now I hit this place every morning for a week, and it's been pretty good.