Wish I had installed these sooner...they allow me to access all the stuff that got lost at the back of my narrow pantry next to the fridge.  And they were so easy to install...explicit instructions that were easy to follow.  At first I was unhappy that I was losing an inch of space that the base took up...but once installed, I was thrilled to have gained the use of my pantry again.  It is a seven shelf pantry so to save a little bit of money, I bought 3 doubles and a single which works well.