How do these mats lay over carpet? Its not a real high pile carpet. I was Just wondering do they slide or come apart or when you step on one does it go lower than the other.

Our Eco-Soft + tiles work great over carpet. In most instances, you will not have any issues with separation or with the tiles sliding around. The only time separation may happen when the carpet is a high pile carpet. If the tiles were to move for any reason, you could use a little double sided tape underneath the tiles.