Nice curiosity, but hardly practical for real world applications.

It needs either a huge heatsink or a very strong fan to keep it cool, or both. And when I say huge, I do mean huge. I found it would sufficiently dissipate heat when attached to a large aluminum pot. As this isn't practical, I rated the product 2 stars. It does work, but it's not really useful to keep anything cool. I suppose it might make part of a curious science project, but not much else. If you don't ensure the hot side dissipates its heat efficiently, the entire cooler will get very hot, rendering it worthless.

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