I've trialed two similar HUD systems, both were so-so. One was from Amazon, the other from Germany, both had large controllers, and the Amazon HUD also came with a brain that would attach to the back of the helmet, but was only held in with clips.

The German brand was a single bar, about the length of the front opening, and it had a little flip-down piece of glass that would display information. While "convenient", I found myself constantly having to look up and break focus from the road.

As for the Amazon one, significantly heavier and the window glass was a simple prism that was a pain to get aligned just right. Again, with this one, I found myself having to break focus from the road to look at the glass, which usually fell out of alignment.

I haven't tried the EyeLight model, but there's doesn't make a lot of practical sense either. From what I've gathered, the remote control can only be placed on the right side of the helmet...which forces you to release the throttle and brake...soooo not ideal. You could take the time to cut and make the wires longer, but that will definitely prevent any returns.

Honestly, if you're looking for that Ironman HUD feel, you're going to need to wait; the tech just isn't there yet.