This was my third PC and for the most part I really like all of its features but. snowy country. So I quit for the winter and just took the time to build a few others. The 2nd and 3rd worked the first few flights and then the 3.3v regulator suddenly blew out. I bought both FCs on every quad build. and ESC together, so I knew everything was new. The last time a friend had 3.3v he was in the air in a 500mm frame and he fell and actually crushed half the quad. Prices for similar items and has sent me parts in the past that were clearly used and burned out. I will no longer be buying iFlight FC and am on the verge of stopping buying ATV parts from Revain. Especially when I can get the same parts on other sites for a lot less.