Very comfortable I hardly notice I have it in my hear. So stylish. This is very well made and looks so nice! With 6 DPI options you kind of lose track of which one you are on and spend too much time having to figure it out. Not loud enough for size, unless u disable dsp mode, (not factory recommended) However the volume and power is almost doubled! It held my bike rack and 4 bikes on about 8 trips with no problem, but when it fails it is a big problem. Managed to fit myself (6ft2 85kg) and my friend (5ft10 72kg) in this. Wish they had them in black. I bought mine from the Nike original site (women size) That precision metal hat switch on the Throttle fails now 100% in the down direction.