Neat and unobtrusive, I like the way it fits closely round the headlamp. Does not flutter or vibrate under way. Relieves pressure on arms and the reduced wind resistance is noticeable in lower throttle openings at speeds over about 45mph.
Not been on long enough to tell yet but I'm sure there will be improved mpg.
I have reservations about the plastic fittings and I think the price is high for what it is but then other makes look equally overpriced and plastic clamps may be the norm in 2018 !
Don't like the clear plastic edging supplied to fit round the bottom. It will end up green with verdigris inside and is not thick enough, so fitted by own thicker rubber strip (see pic.)
Will probably end up fitting one to my other bike so that says it all really.