Impossible or very difficult to use: the male cylinder of this unit supposed to receive the central tube of the paper roll are larger in diameter than worth it, so it takes 10 'and a lot of patience to get to load a new roll (except that test strength cardboard tube ends up damaging!), once the roll loaded, and for the same reasons, it is very difficult to detach a sheet without tearing itself because the roll is too tight! Why not have foreseen the male parts slightly less wide in diameter? I returned it and bought a conventional system, the design does not degrade practicality!