Starbucks was having a happy hour promotion for about 10 days recently, where between 3-5PM you could get half price frappucinos. I (or my wife) went four times over the promotion. 75% of the time our order was screwed up in some way, shape or form (whip when no whip was requested, caramel flavor when should have been coffee, venti when it should have been grande, etc.). The drinks still tasted good, but dag, that is a pretty poor success rate. Service was (and usually) is pretty friendly at least.
Now the question...if I want a caramel/coffee ice blended drink...who am I going to choose, McD's or Starbucks...