The worst BY far is Alderwood. I seriously cannot stand going to the MAC there, I usually don't even bother. I usually jsut go to Sephora there.
Once I was at the Alderwood MAC and as I was paying, I asked the girl if they had postcards left. She gave me the "what the hell are you talking about" look and was so confused. Her manager butted in and was like "What postcards do you need? WHICH ones are you looking for and why do you need them? You know we don't get them for every collection!" Sheesh!