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I use something nearly the same as the link you posted when i have to take
my pro into work to avoid scratches and have found no heat related issues
(this includes the transfer of large amounts of data plus cs3 stuff)
 
I looked at that case and I wouldn't buy it. I use a speck hardcover case and it doesn't have nearly as many vent holes as the one you linked and I have no problems with it. The main reason I don't like the one you linked because it has cut outs to use the MBP's rubber feet instead of providing it's own like the speck case and it has two big holes in the bottom for what seems to be no reason at all.
 
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