I can confirm it's working flawlessly with my Air 2, the first time i was able to get Calibre to recognize my idevice since September (first due to the iOS 8 on my old Air 1, and then to the missing codes for Air 2 and Mini's). I had already given up using Calibre after dozens of unsuccessful attempts and countless installs/reinstalls. It's really good to be back again
So, huge thanks to the ones who made it possible, especially Shellshock and Mr. Goodbar!