Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poorly designed - flimsy components

I've struggled to get the littermaid to work over 3 years. It has been replaced 4 times and I'm finally giving up. The product is made of cheap components that easily break. The device will not last more than a year. The mechanism jams so easily, that it is only a marginal improvement over a regular litterbox. The customer service is appalling. The last unit failed after 2 months when a small nylon cog broke in half. (When I told the customer service person this, I was told that by opening the unit to find the problem, I had voided the warranty!) Probably only a 10 cent part, but the company does not sell spare parts.The idea is good, but this product and the company is rubbish.