i was a bit sceptical at first.
But i can see the evidence on my volvo.
its a dark blue sort of colour, it looks OK in photos but in real life it looks a little "flat"
it doesnt really gleam as much as the paint did on my VXR. Stick the thing under the spotlight and you see the paintwork is swirled to hell. Prolonged use of a car brush to wash it with will just do this to it.
Granted the effects wont be as bad if you only wash your car once ever 2 months or something, but if you like keeping your car clean and clean it regularly, dont use a brush.