So I imagine there are not many here that have used the system. It's not as mainstream as polyfiber as of yet.
I used it back when it was AFS (Aircraft Finishing Systems) which became Stewart Systems (Same stuff). This was back in 1998.
It is an entire system of non toxic covering materials & paint system. You start in a very similar way to poly fiber, with a glue product that you attach the fabric with, then brush out the fabric once you have tightened it. It really is very easy to use. There is nothing very different from polyfiber during the basic fabric stages. You can use your same fabric that comes with the kit.
The difference in technique comes later when doing the painting. It's a 2 part polyurathane type coating and due to the fact that it's waterbourne you need to spray it a bit different than polytone etc. The Stewarts have all the instruction videos and info you need to get up and going with their products.
I covered a MiniMax 1100R back in 1998 and in 2000 won Grand Champion ultralight at the Arlington Airshow. The finish is very glossy (like Aerothane) and has held up well. The plane still looks great with no paint problems over the years.
If you want to see lots of pictures of the covering etc, go to http://www.karmy.com/minimax/pictures.htm