Man I can't say enough about this litter box!  It was super simple to set up.  You pour the included beads into the tray, rest it on the floor and fit the litter box over the top of the tray.  The beads have no scent which makes it good to have it in any room.  It's a big box to accommodate the motor.  The rake is on a 20 minute timer.  The timer begins as soon as the cat steps in.  If they step out and step back in, the timer restarts.  Our kitten took to the box right away.  Our older cat is taking a bit longer to adjust but we're making progress.  Having this box makes having cats much more bearable for me, cause I HATE regular type litter boxes.  You can't go wrong with this one!!  Highly, highly recommended!!