It's quite good. But it's also quite small, quite expensive, and the atmosphere is usually one of older people enjoying each other's company. Where as Starbucks is larger, tastier, and more likely to end up with you sitting in a chair for three hours without feeling guilty about taking up the seat.

Why is it concerning you? If the Viennese thought Starbucks was bad, then they wouldn't drink it either. But they do.