This is one of the more interesting ways to receive some 'free' or discounted services and make a few bucks while you're at it.  Interested?  Great, here's a list of some of the mystery shopping companies that I have experience working with, and that I have a generally positive impression.

Due to the Independent Contract Agreements, I can't name mystery shopping companies and their specific clients. But I can share a generalized description of the types of shops that are available at each of the mystery shopping companies.  Enjoy!