I use mine exclusively for flying. You don't have to take you eyes off the Phantom to see the video you are recording. They come with an Android based controller that looks like it would have a display, but it is only a touchpad. All display is in the glasses. The DJI app works very well, except for the off center issue, which is really not a problem. I set I have has the developer software, but most are now being shipped with the retail release software. You can do a factory data reset and install either version. Also, they can easily be rooted which allows you to install the Play Store. I cannot get the Utility Pro app to install. An email from the developer said it requires Android 4.1. Epson has committed to work with DJI to improve their apps performance.
As for flying with them, you can use the DJI app set to either control the camera tilt using the arrows, or to follow your head movement. The glasses have gps and accelerometers in them. It's almost impossible to get a photo of what you actually see wearing them. Unlike Google Glass, these have two screens. Any photo can only show you just that, two screens. Wearing them, the image converges into one giant screen that you perceive to be floating in the air in front of you. To get a perspective on this, I have a 65" tv hanging on the wall. Sitting on my sofa about 9 feet away from the tv, wearing the glasses, the image exactly fills up the same area as the tv. When outside looking away, the image appears even larger, about like an 80 inch tv. The glasses come with earbuds, so if you want to hear your low battery alarm you can.
Since these are Android, you can install your email, browser, Netflix, etc. With the inevitable software improvements coming these can only get better. I don't regret buying them at all.