My hubby installed these for me  in 6 lower kitchen cabinets.  Installation was pretty easy, but not real comfortable for him.  They do take up some space in heighth, width, and length.  But worth it because now we don't have to get down on the floor and empty the front items to reach the things in the back. I couldn't put everything back in that was there before, but I had too much there and it was great to send some extra items to charities.  So glad we finally did this! They are very sturdy and should last longer than us.