I was sent three different units before I received one that didn't have air in the line.  Since the unit is comletely closed there's nothing you can do to get rid of the air and it makes horribly anoying vibrating sounds.  You will also have to pay for shipping from corsair if you don't fight it.Once I got one that was free of air, the install was easy and I think it looks better than a big bulky fan sitting on top of your mobo.  Performance seems on par with higher end fans but more quiet in my opinion.  Not sure if I would recommend though.  The cost isn't really justified especially with the headache of quality control issues. 

Question: How do you like the installation?
Answer: the install was easy