I was doing some personal shopping at a big box electronic store where I did one of my first mystery shops.  You know the ones...two different departments with scenarios, blah, blah.  I ran into the salesman I shopped in the large appliance department and not only did he greet me by name (!) but remembered what appliance I was shopping for and wanted to know if I was ready to buy!!  
Holy Smokes!!  He wanted to help me with whatever I was shopping for today, took me to the products and told me which ones were the best and on sale. He had done a great job during the MS, and now I see he has an incredible memory too. 
I have never had a salesperson remember like that before.  But since there is only one of these stores within a 50 mile radius of me, I'll have to keep doing my shopping there.  Guess I won't ever MS the store again though!