McDonalds does a roaring trade in burgers, but that doesn't mean their burgers are very good. I had starbucks coffee exactly once, and it was so bad that I vowed never to go back there again. The way to know if a coffee shop is good is to ask for a quattro ristretto with milk, or something like that. If the barista looks at you funny or hesitates in the slightest just go somewhere else.