That's awesome - I love it when the associates are nice - I had this one lady once who told me it was ok I didn't need to help her pick thing up when she dropped a whole bunch of papers. Being nice I did anyways, and she turned to me and said "there's a method to my madness." And walked away - I was upset by that and left, why should I buy something from them?
The positive note will definitely get through though, companies love to get those kind of things.