To buy two pots of paint for a slotcar racing project. And the guy at the till said "Hi" and finished with "Have a nice one", rang up the paint and didn't try and sell me a White Fraud subscription, didn't try and sell me a big box and didn't jig about asking me what I was painting while using the word "kewl" a lot and giving the impression that he hadn't actually listened to a word I was saying.
I could get used to this.
I'd say at exactly which GW store I received this surprisingly pleasant and respectful customer service but I'm sure that if I did that somebody would lose his job over it. :(