I have some after market carbon fiber "1.0 " props for my Phantom 4 Pro, and they don't seem to be any better or quieter than the DJI stock "1.0" props. I am considering buying some "2.0" quiet props to see how those are. A quick check of Amazon shows several vendors selling "2.0" quiet props, at about 1/2 the DJI price. A check of the ratings suggest quality control may be an issue, with some failures reported. Are those non-DJI props basically "seconds" that DJI has rejected, or are they just as good? I think the difference in price, about $23 for a set of four, is just not worth the risk. Anybody have some experience with aftermarket "2.0" props?