Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Extremely disappointed

I am highly disappointed with this device.It has a very annoying soft-power off if I don't interact with it for about 15 minutes. This power-saving feature is understandable and I can basically deal with it by a left click.But it gets worse from here. Sometimes the above procedure fails. You need to completely power-down (remove battery cover) and reset.For the past week or so it required that I comletely redo the bluetooth pairing/discovery process.Today it is impossible to detect the device. In less than a month, this mouse has completely failed.I'm returing it to where I got it. Based on other reviews I've read, I'm not the only person experiencing these types of problems. I'm not even interested in a replacement. I'll get a competing brand.