I was very excited to try this out.  It has extremely simple set up.  It is not battery charged so you do have to position it near an outlet.  The crystals really help reduce odor and tracking. The litter tray is very simple to place.  There are many places online to acquire the refills. The automatic self cleaning is great but I wouldn't recommend this for a home with more than one or two cats.  Overall, I am very pleased with the performance of this litter box. I don't know anyone who likes scooping litter so this is great.