We had one with a counter top, that slid pretty good. your edges do occasionally catch where the pieces change though, so if you coulf get like a back splash or something that is already like 10 ft long, and like 6 inches wide it would be best. I have a sheet of that formica stuff in my basement that were using, so I cant slide it, but it does crack easy, so i dont think that it would hold up to well. Plus its kinda expensive like $160 I think for a 4 x 8 ft piece.
any ways heres are pic of the the counter top rail...