So I'm looking for a helmet mount mirror that is easily removable. For my daily commutes, I think I am likely to continue to prefer the bar end mirrors. So I would like to have a helmet mount mirror that I can take on and off pretty easily, but use it for longer weekend rides on my trike. I noticed I got a sore neck when I was watching traffic on a stretch of heavily traveled roads, and I want a secondary (or maybe primary) way to look behind me.
I did search, and mostly I found eyeglasses mirrors and permanently attached helmet mirrors recommended, but maybe I missed something. In reading reviews for the Take a Look mirror, they don't seem to work great with think framed prescription glasses.. if that's not your experience those may fit the bill.