I have some of the v4 Chromatrim and now some of the v5, in black. I put mine on 1/2" EMT and it works great. I'm not entirely sure why 7'9" was chosen as the length instead of 8 feet.
The product is heavy enough to not blow around in the wind, but it is thin enough so that I can cut it with scissors and punch extra holes in as needed.
It lets me make modular segments for my house outline. It's easy to connect, mount, disconnect, and store my modular segments.