The expensive and heavy all copper heatsink has it's fair share of advantages and disadvantages, such as why cooper is better than aluminium when dissipating heat and much more which the review discusses. These hedgehog heatsinks are imported into Australia by CoolPC Australia from Kanie who are based in Japan. It is often argued which material is best for heatsinks.
Copper can transfer heat faster than aluminium, but takes longer to dissipate heat.
Aluminium doesn't transfer heat as fast, but it dissipates heat quicker than copper.