Short review. Decent sized walk through Starbucks location in the casino. It's well staffed with 3 workers behind the counter.
The line was short, the store itself is clean. About a dozen seats if you choose to stay. I ordered my drink with no problem. Unfortunately they don't accept star reward here. It's okay, you always feel like you're winning when you get something back in Vegas.
They got my order quickly, correct, delicious and remembered not to put whip on frappucino. There were no fireworks or balloons, but they did exactly what I wanted, and for that 5 stars.