In an affort to save $50 we opted for this. Just think its round and only turns very slowley. It leaves small clumps of litted and does not send them up to the conveyoer belt. It's also hard to clean since its round so you cant pin the excess litter against the sides. Stay away as we waisted $100 and wiil be going back to Litter Maid. Its not worth the $50 savings plus you can order here with no tax and usually free shipping. I hope this saves some folks some aggrivation. Give your cats the best, go with Litter Maid:)