Instruct: Classify Amazon reviews into positive or negative sentiment
Query: How can 500+ reviewers like this piece of junk?

Extremely poor reception. Tried in friend's car and also was horrible. However, a different brand my friend purchased at Radio Shack works fantastic (fraction of the cost). With so many good reviews I thought mine must be a lemon, but then I read reviews from others that had exchanged theirs and experienced same problem. Get this, here is my bad, I trusted iriver brand so I tossed the box, receipt, etc...consumer naiveté and brand trust I guess! Anyway, now I hold a worthless piece of junk and to make matters worse am left baffled by taking guidance from overwhelming positive reviews? Could primary distributors pushing a huge inventory of high margin pieces of junk hire folks to flood positive reviews?! ;-) Yikes, I trully hope there is no truth to that! Anyway, baffled and now I get to eat 50 bucks...yippee.