This is my favorite Starbucks in Pittsburgh!
Does it get busy? Yes. Is there usually a line? Yes. Do you get the typical friendly starbucks service you get in the burbs? No. You are downtown not the burbs so don't expect a quite Starbucks where the baristas chat with you. This place is all about the atmosphere!
You can sit in the Starbucks area with your coffee which is bright and lovely or you can go into the lobby of the hotel (what I prefer) and sit in a grand room and enjoy your beverage. This is a great place to meet up with people and get your caffeine jolt.