The shelf and bar are easy to install.  I purchased this to put in between two modular stackable units also by ClosetMaid and purchased from Wayfair.  These shelves are just about an inch too shallow to really match up well with the stackable units so I'm a little disappointed in that.  I know, should have read the dimensions more closely.  I only gave it 4 stars because I ordered two and both had minor damage from the manufacturer.  We ended up putting the "good side" up, but it's frustrating to have a chip in a brand new product before it even gets hung on the wall.