the Slide-A-Shelf is a very well built product.  I am usually very good at installing things or putting things together, but I found the sliding shelf difficult to install.  I did not receive instructions in the box and got so frustrated having to take the shelf out that I finally called the customer service number and found out the the directions are on line.  Even with the instructions it was a little daunting.  All shelves seem to be working fine now.