Bests & Worsts Reviews from Amazon

I purchased this badboy quadcopter for a video production project with great expectations. I even went the extra mile and purchased 5 additional batteries so that everything would run perfect.I got my quadcopter and started it up. Only 3 of the 4 propellers worked properly and the other one ran slowly. With only 3 propellers working it can never fly, only flip over. Tried it again and this time nothing worked.Changed the batteries and nothing worked. I contacted this seller and he agree to offer a full refund. I was given a "mailing address" to their location in china and ship out the package. The seller claims he never got the package.So i never got my refund. They claim that all quadcopters are tested before they are shipped but they accidentally left the test run video on the quadcopter that they sold me. The video clearly shows the copter flip over in the first test run. The second time it flew sideways into a wall before crashing to the white tiled floor/ground. Then they had the nerve to box it up and ship to me. Don't trust this product and the seller. Refunds are impossible and a total waste of good money.