For it's price I'd say there are number of cases available that would do equally well in terms of air cooling.
Plastic tends to look cheap, because they usually use cheap plastics. I doubt anybody cares about it's 'shock' value, it's about looks. You can get a full aluminum case for the same price (albeit generally smaller) which has a much higher quality design.
To each his own, I don't think it's really worth arguing for or against it. You like what you like, never will the time come that everyone will agree with you.
[Martha Stewart hat]
And that's a GOOD thing.
[/Martha Stewart hat]