I set this closet system by myself - it wasn't that hard but time consuming.  After I installed it into my closet, I tried to open the doors to the shelves and they hit the top of my closet.  I have a standard contractor-grade closet.  Seems silly that they (a closet system company) could miss that mark on that.  Thankfully my husband is a carpenter and made some adjustments on his own to get it to work.