Has anyone used any of these products or know about their performances?

Hi Randyb:

I have been installing (Heatizon.com is the manufacturer) Zmesh element for 3 years and I love it. I installed it in my own home and found it to be superior to any other choice I had, for it's application. It installs easily and does what the specifications say it will do. We now have floor warming, primary space heating and snow melting systems installed in NY, CT  and NJ and all are working flawlessly.

If you have any questions, please feel free to ask.

I am also interested in the heating ribbon sold by Warmzone. It appears to be very flat and as far as I know does not require being installed in mortar (wet bed). Can be installed directly under carpet, laminate flooring and maybe hardwood if you don't hit it with a nail. I may purchase a small sample of this and post later on how it works after I install it in our dog house. :)