This is the Starbucks located at Fashion Show Mall near the Skechers store, not at Treasure Island.
Staying at the Wynn I knew there was no Starbucks in the hotel. Being a major Starbucks junkie I was in the hunt for the nearest one. That happened to be right across the street (Thank goodness). Within ten minutes walking distance from the hotel. Definitely doable for the java fix.
The staff was very friendly and after three visits I became that week's regular. Other than that same as any other Starbucks which is the quality of Starbucks I like. Always the same and always something you can count on.