I got my first M2 in today. It may go back as I don't like the fit. The nosepiece is a bit wider than my Radarlock frames, and the plastic bevels on the front side of the nosepiece actually touch my nose making the frame pretty uncomfortable. I imagine long wear would be extremely uncomfortable, and I would just wish I had my Radarlocks on. I can't justify an uncomfortable pair of sunglasses. I do like the look of them though. Too bad they don't fit.