Anyone even remotely considering this......you HAVE to get one!! I used it today and am shocked to say it does exactly waht it says on the tin (box!)
Washed the car, rinsed etc (as per instructions) and walked away. Car was still covered in tons of (beaded) water....i wrongly assumed all the water would sheet off....but panic not! 15/20 minutes later the water had mostly evaporated and left behind not one single spot, fantastic!
Buy one, you'll not regret it.