Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I have not used any of their products, but hesitated because the vendor does not disclose the case material. All 3.5" cases without a fan (surely more than 95% of the market) need aluminum (yes, I'm a yank) to dissipate heat. Plastic is sure to reduce the life of the HDD, and a few reviews on Amazon indicate failure in about one year. Macally makes a metal case, and I have two of them (3.5" and 2.5"). Both get rather hot, and that tells me they are letting the heat out.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.