And...they have a new "lip" attachment for the Litter Robot, that catches the "edge peers" if they hang over the opening- I am so excited, since I have one of those (grrrr), and have been using paint bucket pour lids cut in half to do that, lol. They also have a ramp now, and a few other things, plus you can buy replacement parts from them right off the website after the warranty expires
And yep, no special litter, no special trays, bags, etc., only plastic kitchen garbage bags and scoopable litter (I haven't tried the crystals, but that is a great idea for the drawer!).
And you don't have to leave it on all the time either- you can turn it off, and flip the switch a couple of times a day to clean it (I did this when mine were learning to use it).
When I looked at some of the others, the special trays, etc. were kinda adding up, even though the other boxes were initially cheaper. Plus, push a button, fill it, push a button, dump the whole thing, sick cat makes a mess- take the dome out in the yard and hose it out...so cool, lol. Having a full dome is really nice!
They also have an 18 month warranty (which my sister had to use, and wow, their customer service is great!!!), and a 60 day "you and your cat will love it" guarrantee, where you can return if your cat doesn't like it.
So, yeah, I kinda like mine