Copper is a very good conductor of heat as you all know, but has a terrible habbit of oxidising and turning a greeny colour when being handled. Copper is also heavier than aluminium and this little cooler is quite heavy for its size. I was a little dubious about the way the heatsink is made. It´s a small cooler roughly the same width and length of your CPU and it doesn´t sit very high either, so most people won´t have any trouble fitting it.