This is really just an observation... I am on my third bird in a little over a month. The first one: I thought it worked okay, until one day I had trouble getting a compass calibration after it went through a TSA X-Ray. I thought it was okay after a IMU calibration and the magnet trick, but as I was landing after the third flight it went crazy and flew into some rocks.... It killed the gimbal. Amazon took it back, as I can argue it was a manufacturers defect. The interesting thing, I could only get this thing to go 350 feet in the air, or 600 feet away before it lost signal and wanted to return home. The Second one: I only flew this one TWICE. It took FOREVER to get satellite lock. It constantly lost satellites when in the air. It would never fly straight. It just wasn't "right". I returned it to Amazon in perfect condition... Amazon refunded me. The third one: I purchased from B&H Photo. This is the only one of the three that was already in FCC mode out of the box. This thing gets 7+ satellite locks in about 30 seconds... tends to fly with 10+. It flies further then the other two. I lost FPV @ a little over 1000 feet away on my furthest flight, but never lost RC. It's like a totally different model. So as I read all the threads about people who have absolutely no problems after hundreds of flights, vs people who have to do GPS mods, have flyways, and everything else.... I have to wonder if these are all made in the same Chinese factory with identical components, or if there is a realistic quality difference, and some are just lemons?