Thread: Has anyone used a self cleaning litter tray?

I've been looking at the Omega Paw - it does look good and I am thinking of getting one for Simba. At the moment he does have a large covered one but I keep it in the utility room and when emptying it it means carrying the hole litter tray which is heavy through the house to the toilet to empty it. It would be a lot easier just emptying a small tray. My worry is that with the turning it doesn't the poop get all over the roof of the tray and make a mess? Does it need cleaning out more often?