I have always liked the idea, it does make a Defender more Camel Trophy like or expedition cool.
But my only two negative thoughts is, I dont know they would be particularly useful when driving through scrub or bush tracks, many a time I have clobbered my antenna mount on my Perentie. I'd be worried I would rip them off when off road.
The other thing, when parked in the local carpark, some dickhead walks past and walks into it and suddenly its my fault.

