I bought these to add to the rear fenders of my golf cart - applied last night, now waiting to make sure the adhesive bonds well. Reflectors look like a factory addition to the fenders & would most likely look stock on most cars, depending on your placement - the curvature of the reflector & overall shape help to keep them from looking like a stick on addition, even though thats what they are. Reflectivity is good, item its self is flexible, material seems to be a plastic resin type material.
Pictures & adhesion quality update to come after a couple of days worth of driving.