I have two sets of quick fires in two different locations for about 5 years now. There is nothing that cleans the fronts, sides and backs of the cars better in my opinion. That being said they do require a lot of attention. I would not say that they are complicated, there are a few key adjustments that have to be monitored regularly. If your not the hands on type or are looking for a set it and forget it type of machine than these definitaley are not for you. But then again I don't know of any wrap that is like that and cleans well. Comparativaly I've had the Belanger Gyro wraps in two other locations years ago and these are basically just glorified van high side washers. Maybe at a very slow chain speed in a small tunnel they would suffice but not if you are doing any kind of volume. The quick fires will follow the backs of the cars for about 8-10 feet as cleaning the back of the car over and over until the brush reaches the end of the boom. As you speed the chain up you turn the air pressure up slightly on the main cylinder so it keeps up with the car. They do break some rear wipers from time to time on certain cars like Ford Explorers but as long as you are using enough
soap to lubricate the foam this really shouldn't happen.