My brother and his friend — who is an Engineer — installed the hardware for my elderly parents.  They thought it would take an hour.  It took all day.  The scRews included were not hefty enough; the metal bar on which the doors slide, was not adjustable, so they needed a special saw to cut it.  They knew they were in trouble when the directions indicated they would need a “chainsaw” to cut the flooring.  The job took all day.  They look good, but do not order this as a DIY.  Professionals are needed and quite a few stiff drinks to finish it.