Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nice Covers

I have had these covers before. I only problem is if they are dropped, then they crack. Just recently glued one corner of an old one and it held. We have programmable thermostats, with 4 furnaces in our business building. But our employees want to be really warm in the winter and really cold in the summer. Save yourself some money and the environment.