Pros: I bought these fans to go with an AIO I bought from enermax and bought 4 and I am sold on these. they move air more than any fan on the market. and at such a great price i filled my case with them. At there full 1800rpm speed they have a little noise to them but it is mostly wind noise and when on a radiator they are dead silent. and i had 1 fan that had a slight noise and emailed there tech support and had a new fan the next day no questions asked. I was shocked on the delivery of it.

Cons: wish they came in 140mm sizes. and maybe rubber mounts on the corners. really nothing to complain about. switch placement on rear of hub cant be accessed once fan is installed on a radiator.

Pros: cooling a 4970k cpu at 4.7ghz at 1.28 volts 29c idle and a high of 60c while gaming and that is using the cpu graphics. stress testing got it up to 79c with prime 95 blend and that was the highest temp recorded over 24 hr stress. and all of that was on the quite setting with the fans maxing out at 1200rpm. at full rpm (2000rpm) it is very loud but the cooling difference was down 4c under full testing again. At idle and gaming it made no difference. i took a shot at this cooler considering it just came out and it turned out to be amazing. a quite and cheap AIO that is well rounded. white led is a plus over the blue of the liqtech aio. subtle but just right. rubber tubing is a nice touch and gives it a sleek look.

Cons: well i wish they sold just these fans alone. and cudos for them changing the placement of the speed controller but it is still a pain to switch but it really doesn't matter. Kinda thin fins compared to there liqtech rad and it is a 27mm rad which may be challenging to fit in some cases. Why no RGB pump light. or on and off. just saying.

Overall Review: wish fans could be bought separately, 25mm rad, and maybe a 280mm would be awesome and "cool" RGB pump light would be plus