I use the Third Eye with the plastic clamp for the mirror but have never had good experiences using them as intended. I've been making a small fiberglass mount that is bolted to the helmet visor and that has a properly oriented surface for the clamp. Love it. Been using them for most of a decade now. Drawback is that I have to custom make them for each new helmet visor style. I would love to see Third Eye and say Bell/Giro sit down and talk out a standard.

Edit: (After seeing GFish's post.) Yeah I have to move my head. I have to do the same driving. Not a big deal. Plus is that a mirror that close gives you a really wide field of view.

Ben