Because I was building a new computer and the fans I have used in the past have been relatively noisy I though I would give these a go, mainly because they are from I make I have bought and used for years ... Corsair for power supplies.
I did think they were expensive, but then I realised you get TWO for this price, that put them right in the ball park for good value.
They are easy to fit and quiet, I was really impressed and I will buying 2 more for my spare computer.
The only down side is and this puzzled me, there is no 'direction of spin' and 'direction of air' arrows on it ... why ?
Every other case fan I have ever bough, even cheap one has this and I double and triple checked, and no they aren't there, so I had to power then up to fine this out.
Other than that these are the BEST fans I have ever used, so don't hesitate to buy them,