Just got a pair from Amazon Warehouse at a knockdown price. I have made up a temp holder to fit it in my remote. Also made up a nose support as I wear glasses and the standard one let it slip down. It runs Go4 well and the ability to see the camera view and drone through the glasses is great. It was also missing the earpiece but my Sony bluetooth headphones work well. I have a bluetooth mouse that works without a dongle and that connects and allows easier control than the touchpad which is very sensitive. As a bonus when I can't fly I can watch movies or youtube in 2d and 3d. so well pleased at the knockdown price but the full price? they are having a laugh! Any one else using them and tricks and tips to share?