Service Sleuth is a great mystery shopping company that I have worked with in the past. It is FREE to sign-up (you should NEVER pay to sign up with a mystery shopping company) and within a few minutes you can search to see what kind of mystery shops are offered in your area. Service Sleuth has movie theater mystery shops, airport mystery shops and retail and restaurant mystery shops - something for everybody! They pay through paypal and paid me exactly when their terms said they would. The scheduler and editor were both nice to deal with and I recommend this company to others, including new shoppers. Sign-up today!
I am planning to do a comprehensive FAQ-type post on mystery shopping so if you have a question you would like answered, please email me or leave a comment!