I was attracted to this Magnifier Headset, primarily because it appeared to be comfortable and had a built-in LED light. I also liked the fact that I could use may regular glasses along with the headband magnifiers. When I received it, I immediately opened the package, glanced at the brief instructions, and started testing various combinations of lenses. I like to always have two different magnification lenses installed - one for clarity and magnification in the position and at the distance I work at day in and day out. This set provided that option too. The product fits comfortably on my head when I slipped it on and turn the adjustment knob to the right spot. I will say, and this is the only reason for my "4" rather than "5" rating, that in my typical head-down carving position (picture sitting in your chair and bending forward and down slightly, looking at your thigh) I feel the unit slipping forward, as though it might come off the top of my head. But, it's okay when I tighten it.
