Had a cat genie once it was the worst because It had proprietary cartridges that you had to buy and they were like $30 or $40 for a pack and you had to buy their granules too. When it would wash it would take probably an hour to clean and then sometimes the hose would clog up.
The one in your picture is kinda what I have now but used fresh step crystals, lasts for about a month and just dump and replace....
Buy a stone box, not a litterbox. Like this. Put the little stones on it, keep it close to a water drain and just wash all the pee off. And take the poop and throw it out.
Easy clean, low cost and the cat loves it.
Davaccount Kennewell
Jessica M Bruce
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Hector Raul Parson Jr.