Here's a quick video showing the different OSD options:
I've never used an OSD, so I didn't really know what to expect. I thought I would like AirRace the best, and I thought I would like HUD just because it looks cool. I didn't think I would like EzOSD at all. I was totally wrong. EzOSD is my favorite by far. I was a little overwhelmed when I first tried it, but after a little getting used to, I really like having all of the information available. AirRace is okay, but it left me guessing about how much battery I had left. I could barely even fly with HUD because of all of the stuff right in the middle of the screen. I didn't like it at all. I like the idea of Gamer a lot (maybe because I like to
fly low), but I don't see myself using it if I'm just out flying. If there were multiple people using it so you could compare scores, it seems like it would be a lot of fun.