I opted for this product from the Wenko series because I did not want to drill into the tile in my apartment. The Prminzip is really easy, you stuck the holder by means of a Klebschtreifens already the holder is on the wall, screw the tube of glue into this opening provided filling the cavity with glue and can cure the whole 24 hours, and everything holds bombs laid !!! Supposedly also leave everything remove a trace, this I can not say anything yet! :-)
I can only recommend the Wenko products since the installation is really easy and bomb holds and to drill the no quencher.