Having tried several whistles, including the one sewn into the motherboard, I still had to purchase from Microsoft. If you are now thinking of buying a whistle for 400-1000 or buying from Microsoft, do not spare the money and really buy it better. The problem with regular whistles is that they will drop your frame rate, especially when the controller runs out of power and your frame rate drops to 10 frames in games, despite the fact that the processor and video card will not even be 1/3 loaded, all these drawdowns are because of bt whistles. Even when the gamepad is fully charged, the frame rate is still a little twitchy, I measured it with the help of special utilities with the usual whistle and from MS, microlags still slip through with the usual whistle, jerky frame times, everything works perfectly with the whistle from MS. In general, decide for yourself, the stingy one knows how much he pays. In my opinion, it is better to pay once and not wash your hair more than to suffer. I highly recommend buying. : For those who do not understand what I wrote about (about the drop in fps and lags), then google "frame drop bt reddit" or "frame drop xbox gamepad bt", this strange bug with a drop in fps and lags in the video "Xbox Controller is Robbing Your FPS | How To Fix"