My girlfriend used this place today and was charged $10 and got the $3 services. When she confronted the attended about this, they said that they were having problems with their system and offered to rewash the car.
Why no offer a refund? How many other people were lied to and cheated out of $7? Why would someone want to have their car washed twice?
Skip this place and save yourself the hassle and total lack of customer service when they screw up.