My initial impression of the durability of BF was doubtful. However, with a more gentle wash, the shine and beading/sheeting protection is actually holding up much better than I originally anticipated. Is it (durability wise) better than Zaino or Klasse? I don't know..... But it's still on the surface of my car after a few months and the shine is still going strong.
If slickness is a property that you are looking for, BF won't be for you. It definitely isn't very slick. Even on initial application, it doesn't have the slickness of Zaino. As for the claims made by CMA about the product, I think that they are fairly accurate. The shine is very very close to a carnauba wax, fairly easy to apply, lasts longer than wax etc etc. I don't think that it "needs" a topper, but some may prefer it as with Klasse users.
I'm not trying to start a "this is better than that" argument, because I doubt that there is any real answer to that. I love Zaino and the way it looks on my cars. I love BF and the way it looks. Z is slighlty easier to apply/remove. BF shine is more like wax, but I think that I like the Z shine just as much even though it's different. I don't know if BF is as durable as Z, but it is better than wax for sure. I wouldn't shy away from any of these products....they are top notch! :xyxthumbs
H