I ordered 7 of these for my new kitchen.  They were very easy to put together and installation was a snap.  Once I figured that the backets for the back are adjustable and I didn't need blocking everything went in very quickly.  I used a level to find out where to install the left bracket after I had installed the first bracket.  I also cut a piece 3/4" by 21" to use as a template for the sides, so the glide rail was straight front to back.  I'm a 61 year old female who feels this was pretty easy to install.