Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cats killed the Roomba

I have two cats and a large concrete floor only partially covered by a rug or two. This should be perfect for a Roomba. But the brushes kept getting clogged with cat hair. Yes, I followed directions and cleaned them. Then the main brush developed a short, and it ultimately stopped turning even after I cleaned it out. Then the battery would not hold a charge. They sent me a refurbished replacement. Same issues after just a couple of weeks. I love technology and I wish this thing would work as advertised, but it is simply not sufficiently durable or capable - yet. I'm hoping future generations of Roombas overcome these issues. As of now, it's just not ready.