I put Cquartz UK 3.0 on when I got mine. I don't think the ease of use was fantastic, but doable. A friend who used to do cars at shows also did his vehicle with it and said the same thing. Oddly enough, I had two lines off my front hood a month or so later. They were exactly where water had frozen on the hood. I contacted Carpro and they said it was impossible for water to have caused those lines. I agree, but I also have zero clue what could have caused such uniform water type lines to do that. I tried following the troubleshooting advice they provided, but it only expanded the lines. The coating very clearly failed in those lines somehow. The rest of the truck seems like it is doing great with it and I still have some of the UK left, so I plan on hitting it with reflect to polish off the existing coating on the hood and re-applying.
I'm also going to do a proper correction on my wife's 6 year old black Camry, and then apply a coating. I might try the Polish Angel Viking Coat for that.