Questions of duraceramic installation

Hi
Does anyone here have any experience with the installation of Duraceramic?
Is it better to install it with or without grout?
If you can install without grout, is it as good an installation as with grout?
Thanks

Here is a link to installation info and vids - http://www.congoleum.com/installation_menu.html

One of the key benefits to using grout is that you can make your installation look better than without.

For example, if you are doing a 16'x20' room, if your layout is off by even a hair, and you have no grout lines (butted install) you can't shift the angles at all without ending up w/ gaps. w/ grout, you can shift your entire lay to "hide" your mistakes... and you can hides that are a lot bigger than just a hair.

If the walls aren't damn near absolutely square, and straight, the grout lines are the ONLY thing that's going to make your install look decent.