Product review (4 stars): Unsure about cooling or rigidity improvements, but looks neat.
I haven't quite verified how much of a cooling improvement this provides, but I do like that it protects the components on the exposed backside of the card. Installation was also easy with the provided screws. I do feel that it feels a little flimsy for an aluminum cooling piece though, especially when I've read that it's supposed to also add rigidity to the card.