Had mine since May, 2016. 3 Batts approx 40 cycles each. Two issues: Recent takeoff had prop spin off, even after double checking, had to bend the locking springs up slightly(but not too much or will have trouble getting prop back off). Was going to replace motor tops with different design but instead had made a no-go gauge to check spring height periodically. I suspect one of the motor protectors was on incorrectly while traveling in the backpack, since the spin off happened twice on same motor. No problem first time, thought I didn't double check, but last time it had violent tip over and camera gimbal separated at the horizontal motor. Camera was hanging by the ribbon cable, just snapped the motor back together and worked for several flights and then lost pic and gimbal functions. Replacing ribbon cable this weekend. No other problems, I still can't believe I haven't crashed or lost it yet, like I'm expecting it each flight. Good luck