First let me just say that this is a good product, and that I regret it in the sense that it's something I bought that I will likely never use again, but I don't regret that I tried it (unless I could somehow have gotten the knowledge of trying it without actually having shelled out for it).
But the $80+ I dropped on Z2, Z5, Z6, Z7, and ZFX was basically a waste in the sense that I don't like it and likely won't use it again. The Z12 was very nice, though.
It was very shiny, but it had no gloss. My paint didn't look red when you looked down it. It looked like a mirror. I bought a red car because I like red... It's possible to have high reflection and still see the red. I'd prefer it to look like a sharp reflection off a red pool than off a mirror.
It beaded a lot, but the beads don't move off the paint. So the car would get a lot more water spots (which seemed harder to remove than with Blackfire) and would be dirtier after driving in the rain.
It seemed to get a lot more crud stuck on the lower body. There were more times I needed to use bug & tar products or spot claying to remove little stuff stuck to the rockers and lower doors. With Blackfire it was very rare that I had to do this as everything came off in the wash (using the same #00 for both).
I also think it is a pain to apply. I much prefer being able to apply Blackfire right on top of a polish, still get months of durability, and a lot more depth and pop. On my wife's car, I find Klasse or MPPP to be much easier to apply, and both have great looks.
It wasn't a bad product, but I seriously can't imagine using it again. I really hate getting rid of stuff, so I'm not sure what I'll do with it. Maybe I'll just keep it around just in case. You never know when you'll change what you want from a product and start using something again that you previously put aside.
I think I might just give there professional line a try.