Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Changed my mind from 5 stars to 2 stars!

When I first got this I thought it was great and I originally gave it 5 stars.UPDATE. I have had this almost a year and I don't like it that much. I now give it 2 stars. It is VERY messy and smelly. The cats kick litter out and litter catches in the small dumping doors and piles up on the floor on both sides. Sometimes a clump will get caught in the doors and the doors won't close. The inside gets nasty quickly and it is a pain to take apart and clean.I have recently bought 2 large litter boxes with doors and am using sifting liners in them. They are much less messy and smelly and it takes very little time to sift/scoop the boxes each day.