So far I've used 50 Cal's Pentawax, 20:20 glass cleaner and their raspberry air freshener - all of which are extremely good products! - Pentawax, very easy application both on and off, and the durability is insane. At £50 this wax is a bargain. Smells unreal too :) - 20:20 glass cleaner- again very easy on and off and leaves the window streak freak and no wiper smear. - Raspberry air freshner - this little metal tin with spray top is excellent value for money, the bottle alone would cost a fair amount. You could buy a bottle of this (and it's not a small bottle either) or you could buy a few magic trees which run out in no time! I've also watched a friend apply the 50 Cal Cover Up Filler Glaze, as mentioned before.. Poorboys Black Hole should move aside because this stuff is very very good indeed!