We have porcelain stoneware tiles have a very rough surface (but still just) Unfortunately Powerstrips held not there. I then attached the holder with the replacement trip to the mirror, where he holds bombproof. The holder provides very high quality made, unfortunately it is very susceptible to water stains and fingerprints and after a few days the holder already looks very unclean, because of course, the toothbrush is nasst (with me the attachment of an Oral-B) after use .. Clear you can clean, is just consuming :)