I just installed a pair of these on my LeMans. Personally, I think they are very cool due to the fact that they are VERY subtle. We should also clarify that we are talking about door edge guards that screw on to the door via small screws through the tabs not the "push on" crap that you can buy at the auto parts store. BIG difference between the factory "screw on" vs. aftermarket "push on"!
With the screw on type, they are not very noticeable when the door is closed. In fact, they are quite subtle. I think they are more impressive looking when the door is open.
Although it's hard to tell from the pic, but it looks to me the ones in the picture that is posted are aftermarket, push on type as they are quite noticeable and seem a lot longer than the factory screw on type. I may be wrong...
Here is a picture of the ones on my LeMans, I had them on our 68 Bird as well. A seldom seen, but yet another awesome option by Pontiac!