MFI Review-
I like it.
So far I have only flown with it on commercial flights. If you are sitting in the window seat, the MFI will pick up a signal on a 737. Then you get to follow the aircraft using Sky Charts Pro (or your favorite app). I can see airspeed, altitude and look out the window to compare with the moving map display on my iPhone. It really gives us pilots geeks something to do when flying commercial.
The on/off can be tricky at first. You swipe your finger across the unit to toggle the on/off. When I first powered the unit up I didn't quite get it. But it didn't take long to understand a slow straight swipe across the LED panel will toggle the power. Not a big deal.