It's brilliant! It has all the features it says, but there is one small issue which, while not affecting performance, does inconvenience:
On the packet it does not say which way round you have to install it as the fan can be for intake or exhaust, so I had to plug it in before I could screw it in place. So you don't have to, here's how it works: when the "antec" writing in the centre of the fan that does not move (on the sticker) is facing out towards you, then the fan is pushing air towards you (exaust); therefore when the "antec" writing in the centre that DOES spin round is facing towards you, the the fan is sucking air from you (pushing air away from you) and so acting as an intake fan.
Apart from this teensy weensy minor little oversight on the part of antec, which only took me 3 seconds to figure out, I was greatly impressed by the spinning blue blur that works marvelously