My family had just moved into a newly built home. Our budget only allowed for some of the closets to have professional installation.  To finish up two closets on our own, we purchased two systems.  They are awesome!  You have to mount specific pieces to the wall for a secure connection; however the kit allows for you to configure pieces as you see fit.  These will be great as our family grows to change and configure when needed.  In addition, they are better then the stock wire rack my closest designer used.