I have a pair of Milenco guards fitted on my Ducato/Rapido and have just returned from a week in the Scottish highlands. On the road south from Fort William which is very very busy and quite narrow in places I heard a loud bang to my right and saw my little overtaking mirror hanging by an electric wire and knew I had just been hit. When I managed to get stopped in a safe place I was able to clip the little mirror back in again but the casing of the cover was badly cracked in two places with the bottom corner almost broken off completely. A temporary repair got me home and a visit to Halfords for some fibreglass resin, matting and an aerosol of white wheel trim paint, a few hours work and it looks as good as new, I'm ready for the next hit. If I had not had my Milenco covers I would most definitely be forking out for a new drivers mirror. So yes, they do work!
Incidentally, on a site we stayed on in Ullapool I counted 80 motorhomes all staying on the site on one night, that's how busy the highlands can get.
Floorman.