We have some of Wenko bought because we wanted to avoid drilling into tiles. The toothbrush cup, however, are holding the worst with the holder "MagicLoc". Every few weeks you have to fix it again. The bracket "TurboLoc" - for example for the towel rail has proven itself for more than 12 months of use. Also Powerloc for toilet brush or shower items is much more reliable. Who do not mind the Zahnputzbecher hang every few weeks back no problem. The tiles are smooth and clean, so of dahre actual good conditions.
