We got this hardware and the doors separately to cover 2 closets close together.  Just what we expected!  Great quality!  We should have taken a little more time to be sure both rails were level and the same height (from the floor...instead of trusting the ceiling was level!) in the beginning.  We finally got it...but that was on us! We used a 1x8 board for the support of the hardware and think we did good on that.  Very sturdy.  I will caulk and paint the back board the same as the wall.  I will post a finished photo later.