Pros: Even at full speed these fans are quite, and move a lot of air. Easy to install, although a bit different from your average fan.

Cons: None.

Other Thoughts: I noticed some customers complaining about how difficult these were to install or how they made some noise. Nonsense. My room is quite and even at full speed I cant hear any of them and I have 4. 6 if you include the CPU radiator fans. I can watch movies, game, etc... without any interruption from fan noise.

Pros: Move lots of air and can change the ring to color match.

Cons: a we bit loud when on 100% but wo they move alot of air.

Other Thoughts: Move a ton of air.

Pros: Pretty decent fans and they look good.

Cons: They're a massive pain to install. The have soft rubber corners with hard inserts for the screws. You have to thread them yourself using a screw, which is pretty hard when they're inside soft, flexible rubber. The screws that come with them are practically impossible to do this with. The screws from the stock fans from my case worked far better than Corsair's own screws. If you have problems getting them threaded try some canola oil and a different fan screw.

Other Thoughts: High quality, good looking fans, but you might throw them out the window in frustration before you get them threaded.

Pros: I know these fans are high performance, but do they have to be this loud?

But, they do what they're supposed to and that's move tons of air!

Toss in the low noise adapter and you've still got good airflow and near silent operation

Cons: Loud...REALLY LOUD, but they at least give you a way to tone it down and it works great.

Other Thoughts: Sensitive ears beware, but they work as advertised so I can't knock them for it :)

Pros: Good, clean, nice aesthetics. Easy to mount. All the hardware needed. Good flow.

Cons: A little noisy, its to be expected.

Other Thoughts: Should have got more.

Pros: Quiet fans, high cfm, red white and blue rings. Over all these are great fans

Cons: Would be nice if they included long mounting screws as well as the short ones.

Pros: Fast setup, Quiet
Rubber Grommets a nice touch.
Absolutely crushes Stock fans.
Tons of air flow.

Cons: Zero.

Other Thoughts: I have these setup vertically in the front of my case.
They are quiet and the red matches the color scheme i got going.
Get these for instant results.

Pros: The fans are very quiet, and you get extensions if the fan plug cannot reach the motherboard. Nice packaging.

Cons: I was disappointed after trying to mount these fans in my case. The rubber mounting for the fans is horrendous. It is difficult to get the screws to be 'snug' and 'flush' because the rubber mounts twist and bind up. If they fixed the mounts I would have given the product 5 eggs. They are no good to me if I cannot cleanly/safely mount them.

Other Thoughts: I hope I can get the fans out one day.

Pros: Something or other I liked about them, but the cons drove it out of my mind.

Cons: These fans come with three color rings (red, blue & white), but no black. You can't use them without the rings because they are part of the shroud.

The air flow is nowhere near their claims. These manufacturers are either outright lying or they are using a funnel type reducer to boost the air speed when they are measuring.

I'm sure when placed behind a front panel or hard drive cage you will receive very little cooling.

Pros: This will most likely come off as a fan boy review but I am just giving my honest opinion of this very interesting product. These are definitely some premium fans that can even compete with NB's but are still a bit lower priced, especially in this twin pack sale price. Honestly everything about these fans is great from the build quality, to the default RPM to noise ratio (granted these are the performance edition ones that are higher speed and a bit louder). More than performance these fans also look beautiful with their customizable rings and clean black aesthetic unlike some other premium fans that look rather unappealing. These fans come with all the accessories that also make them feel premium.

Cons: I couldn't find too many issues with these fans but while nitpicking I found the rings a bit tricky/difficult to remove at first but soon after they became more usable. I also found them a bit expensive but after thinking about it for awhile I now understand.

Other Thoughts: Honestly These are some of the most accurately priced fans I have encountered where the price is very justified. The pricing on these fans seemed a little high at first but once I used them/reviewed them I soon realized that the price really is justified by the exceptional build quality, the rubber bumpers, the fan extensions/undervolt pieces, the ring changes, and the general high performance-to-noise ratio is excellent. These fans have changed me to a corsair only fan (pun intended).