Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Terrible Purchase

I was so determined to find an easier way to deal with litter that I ignored all of the negative reviews for the Purrforma and purchased one anyway. BIG MISTAKE!! The motor has no power and gets stuck often. The rake leaves all of the urine so the litter becomes wet and stuck to the bottom of the liner, causing the rake to get stuck and an awful smell. The instructions claim that you can change the bags once a week and the liner once a month...WRONG!! I had to change the bags every other day and the liner was disgusting after just a week, and new liners cost over thirty dollars!! This box made my entire house smell terribly and my cats began to use the bathroom on the floor because the box was so gross, and I changed the bags and added fresh litter and a smell absorber every other day! Don't be stupid like me and ignore reviews, don't buy this product! The Purrforma is a waste of money and time, I only used it for two weeks!