Very happy so far. Fitted without drilling my brand new mudguard with the (very) sticky fit kit. Didn’t even remove the mudguard, despite the recommendation (though I do have a new bike not yet ridden in the rain, so cleaning the inside surface of the fender was easy). Trapped an old rag between the tyre and the inside edge of the fender to hold the extender in place for the recommended twelve hours. Not fallen off yet - and no sign of gravel rash on the (huge) radiator...........so far so good.