Instruct: Classify Amazon reviews into positive or negative sentiment
Query: expensive, but cheaply made

I bought the more expensive model because we have 5 cats. It was fabulous the first week. Then it started making noises...now it is almost unbearable. The trays are very cheaply made. Could be made of a heavier plastic. Cats don't like the ramp, won't use it. Very disappointed. We are on a fixed income and it really hurts to spend this much money on something that is so cheaply made.