Works great, smells horrific
Really effective at removing dirt and fallout. Quite viscous compared to the Bilt Hamber wheel cleaner, this is more 'gel' like and so clings to surfaces better and for longer. Also found it to have better cleaning power than the Bilt Hamber product.
Simply spray on, allow it dwell and agitate if needed (foams up nicely), then rinse off. As with others, the smell it produces is horrific so do use it in a well ventilated area. Would recommend although not compared yet with Koch Chemie, my preferred brand