Third Eye Mirror Helmet Mount

I just bought a Third Eye Mirror - the helmet mount one. I like it. It took a few miles getting use to. I was worried with my progressive lenses. Once I stopped trying to turn my head to try to see out of it, it worked fine. Its bigger than I thought. Some of the reviews I read, complained about vibration, this happened once but really didn't move out of adjustment too much. I also have a bar end mirror - thats not so great. I would diffinitely buy one of these mirrors again. :)