more than anything else the actual 'washing' of cars at these places leaves much to be desired. its a well known fact that you shouldn't wash your car if the body is hot, but a lot of these places don't have shaded parking and after a long wait, you end up washing a hot car, which means you get streaking. secondly a lot of them use sub standard car wash products, and horrible rags to wash and wipe the cars instead of wash mitts and chamois. the idiots at the car wash just try to get the job done as quickly as possible with minimum attention to detail and rub the cars too vigorously. the result: you get scratches and swirl marks. the car ends up looking in worse shape than what it was before! my take on this is invest in a quality pressure washer,car wash liquids, wash mitts, chamois, microfibre and do it at home. good for your health and your wallet!