Since we can not drill in our apartment, we were looking first for bath accessories for gluing. But then we saw and tried this Vacuum system. The uncomplicated installation inspired me real. Bringing the first holder in the correct position and then pulls with the included pump out the air. The wall shelf has wonderful space for so many things that were otherwise turned off in the shower mostly on the ground. Despite the two shelves, it is not too bulky. Drilling Finally a system without that works great and can be attached easily. Toll !!