The heatsinks are really nice. Pre-installed adhesive film, very very nice. For effect, I can not say anything because I have not overclocked the Rpi2. I have been in the 4 Kerner not quite before.
For installation outside the view is good the thing. As soon as one is supposed to see the Pi but, I would not recommend here. Housing 3 star, cooler 5, making in total. 3