Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor signal strength makes this virtually worthless

I've had this router for a couple of months now and am sorely disappointed by its lack of signal strength. I originally had it in my office but my laptop would lose signal when I was about 10 feet away. I had to move it out to a hallway and even then it only has an effective signal when it is in line of site and within 20 feet or so. I'm in the process of looking to replace this door stopper with something useful.