I have no issues with the air 2. I don't use mini 4 but my friends do with no issues. I use a mini 2 and it works fine in temps under 90F. Above that temp it will overheat and the video link will get garbled.have you flown with the mini 4 or any of the minis I have the mini 4 no cell and just ordered the air 2 just wondering is it a huge difference and is the larger screen a issue