Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Idea, Inferior Quality

The antenna worked wonders for about 2 weeks. I had 3 bars of signal in an otherwise "no bar zone." After awhile, it completely died, leaving me with "Searching For Service" if I plugged it into my phone's external antenna jack. When it works, its great! But the quality of the product is severly lacking. I'd STRONGLY recommend buying some other external antenna.