Instruct: Classify the given Amazon review as either positive or negative.
Query: Defective - wouldn't fly over 6" and lost power after 5 minutes

We purchased this item as a special gift for my father, who knows how to fly R/C helicopters. He fully charged the unit, and the helicopter did not have enough power to get more than 6 inches off the ground. After 5 minutes of running the helicopter and trying to get it to fly higher, the heli lost power, flipped over, crashed, and broke. So here we spent $56 for what we thought was a nice gift, and my father got to fly it one time and just 6" off the ground. We're incredibly disappointed and P.O.'d. We're not sure whether we will get a refund or will be able to exchange this item. My advice to you: DO NOT BUY THIS PIECE OF JUNK!