I've owned this headset for a while now. See my review here. I'm on my second one since I did wear out the wire on the first one which is a weakness. Although, I imagine the different shape of the newer models (750 and 800 or later) helps since it appears to protect where the wire comes out of the body.
The lead rotates slightly each time you press down and lift up to keep the tip worn uniformly so it always writes smoothly. There are versions with nicer bodies as well.