Anyone used carpet squares in their house?

We got them for my sons room. We got ours from this fancy-shmancy place called (I'm not making this up) Flör, which sounds like the made-up name for a snooty rug store on the Simpsons.
Anyway, it was actually great. My son got to pick out the colors and the pattern, and it was super-easy to install. I wish we'd thought of this when he was an infant. Then I wouldn't have had to spend four years looking at the spot on the rug in his room where he puked red Snapple apple juice when he was three.

I have flor tiles in an area rug setup. I love them and they are easy to put in. Lots of fun patterns and colors to choose from too, with some patterns that make it difficult to tell that you are even using tiles.

Ooh- now I want to do them for my daughter's room as well!  Do they mate up okay with regular carpet?  I guess I could just put in a threshold.

Use your favorite search engine and look up Milliken Legato Carpet Tile.

I own a flooring company and sell this product. It's easy to do yourself and looks great.

Good luck.