I'm going on right about two weeks with the Take A Look mirror and finally got it adjusted where it suits me a couple of days ago. Had to adjust it so I can see my own eye in the bottom corner -- that requires the least swiveling of my head to see what I need to see. It'll be handy as a supplement to my handlebar mirror, but won't replace it.

I'll be getting another Mirrycle so both bikes will have their own -- it's a hassle swapping between 'em, but I like that particular mirror well enough to get another. It's even better since I discovered it doesn't need the extension arm to be functional, so I worry less about snagging another cyclist in group rides or bollard in the narrow trails.