For good service in a restaurant, the waiter/waitress usually gets a thanks and a great tip. For poor service, we don't usually say much and give an average tip. For good service in a business or store, we always say, "Thanks for being so helpful!" for poor service...well it makes it hard to buy something if you can't get the help you need. I don't say anything, but go to another store. I think when store managers or owners recognize their workers for good work, it encourages other employees to work harder. Satisfaction is a job well done.