I visit pretty regularly to have my car detailed. They always offer amazing and friendly service leaving my car looking good as new. Complimentary beverages while you wait, even massage chairs and Internet to pass the time.
They offer a stamp card which gets you a free wash after 10 washes as well as a 72 hour rain guarantee (with receipt).
Only downside I have found so far, the deal offered through Yelp was not accepted at the Rainbow location despite my checkin and purchase being linked to said location. Otherwise I would've very quickly left a 5 star rating.