I have had good luck with mine also. My temps on my buggy were almost dead on with jhautz. Mine is a little more of a hack job, but it seems to work well. I bought two packages of this memory heatsink (I wanted the fins to run longways)
http://www.dealsonic.com/thera1ddrsdr.html . I cut them up and used thermal adhesive to bond them to the bottom of the ESC. Here are a few pixs.