I bought a Typhoon G toward the end of January 2017. A part was missing for the gimbal, but I was able to fly it anyway. After about 5 flights, the battery would only last 12-15 minutes...so Yuneec sent me a new battery along with the missing part. All seemed well....but since they recommend calibration, I decided to calibrate it. Of course I had to try everything once it was connected to my computer. Number four motor had a rattle in it...even though it flew perfectly, I called customer support. They listened to it over the phone and had me send it back. So it has been gone a while and I decided to call them. Surprise....the new hours are M-F 8-5 PST. Wow...I guess I got spoiled with Horizon Hobby 7 days a week. Anyway, I still don't have any idea when it will be done and sent back since their hours don't match mine. BTW...the ST-10+ had an issue with the USB port which they needed to adjust.