I fitted them to our 1985 4/4. When we came to specify our current car, they did not even make the short list of extras. Spent more time trying to avoid cracking them with the side screens.
Their primary value, IMHO, is that they stop the side screens moving away from the screen pillars at speed in the rain. We had the Heart of England ones -not the posh ones that fold inside when the roof is up.
