Bought a Jumper T8SG RC transmitter to use on computer flying simulators and quadcopters. After a month it came and worked for 20 minutes. I contacted Geekbuying.com 6 times with no help, another 6 times through PayPal with no help. The only thing they did say is they don't warranty anything but controllers, the Jumper was not included. At first Paypal said they would give my 70 dollars back. It cost 56 bucks to send it back to China and at least 2 other customers say they deny receiving items. So I would have paid more for nothing. Paypal knows about Geekbuying but does not warn customers.