This worked great for us.  We were afraid to drill into the tile and couldn't find a stud to ensure it would stay secure.  This grab bar allows for our guests to feel safe while getting in and out of the shower in our guest walk-in shower.  It hasn't budged a bit.  We followed the install instructions to a "t" and it worked perfectly.  We saw some of the negative reviews and figured it must have been due to installation technique.  It really is construction grade adhesive but you have to make sure you follow all the steps.  This is a winner for a no-drill install! Would definitely recommend.