I had my last Littermaid litterbox for 6 years and it worked great. I can't think of many times when it jammed up. I just got this LME9000 Elite Mega box and have already seen things I am not so happy about. The metal grate doesnt work as well as the plastic grate in the old box. There tabs that old the plastic lid in place do not secure the plastic lid very well. It is hard to secure the collection box under the tabs on the bottom of the box. Overall I kinda wish they had just left the box the way it was. Oh well. I am sure this will last me 5 years or so.