I have the glyph.
I like that you can easily view the FPV and your RC by just moving your eyes. The picture is a smaller FOV but quite bright and visual. The video on the RC goes out when the HDMI is plugged in but the telemetry is still there and also in the Glyph view.
For me, it is difficult to adjust in order to see all the info available. When moving your eyes to see corners you lose areas of info. It feels as if I can't get far enough into the viewing area. It's not very comfortable but I will keep it pending more info on the DJI Goggles with the Mavic.