I've had my paint for little over a year, and there are a few things I noticed;
I used Martin Senour paints for everything except clear. Clearcoat was the Satin Clear from the Paint Shop line, I wanted to try it out.
The base paints worked out pretty great, for having never painted anything before, I'm really really happy with a "working quality" paint job. I have a couple VERY small (1/2 cm) areas of bubble/lift, I'm guessing there was something leached into to the filler, and I' must not have done enough to handle it.
The clear is very soft initially, and even after about a week, its softer than a normal catalyzed clear. Here a year later, it holds up, but you can tell its not perfect.
It get SO FREAKING DIRTY ALL THE TIME. And to maintain the finish you need to use a good matte-friendly wash. I have the Satin paint was from Chemical Guys, and it work great....even better when put through the Foam Lance on our Pressure Washer.