Just got my ZAIO and CS. The way some people have been writing I was expecting a couple of little bottles ( not the case at all). If CS goes on like the beta testers say then I have a ton of applications . Actually this weekend I put 2 coats of Z5 pro on. I couldn't wait for the ZAIO. During this post I decided to apply CS ( it took me 10 min to use the CS and now I am anxious to see in 20-30 min. how it will look). I did it with the lights off so I can get the full effect in a little while when I put them on. Nothing is easier than CS, I am betting nothing looks like CS either.