The PetSafe - ScoopFree Classic Self-Cleaning Litter Box was very easy to assemble.  We were excited to try this product.  Just the thought of a self cleaning litter box is a great idea.  It would be beneficial to us by saving time and effort changing the litter out and reducing the smells that come with litter boxes.  We put this new litter box close to the old traditional box and left both of them for a few days for the cats to adjust.  After moving out the old box we have not noticed any use in the new box.  Either the cats are not using it or this box is so efficient that you can not tell that it has been used.  No footprints of any kind have been seen.  No noises have been heard either.  Our cats do go outside thru out the day and night. The old box was being used by the cats but not sure about the use of the new box.  I would still recommend trying this product.  It's a great concept.