Pros: Very good airflow/noise ratio, and that's why you're buying these, right?

Cons: I'm not a big fan of how they look... they don't really go with anything aesthetically. They're still a bit loud at 100% load... I recommend a fan controller or low-noise adapter.

Overall Review: I'm using 4 of these in my case (2 front intake, 2 side intake), and I'm really happy with them! They move a lot of air more quietly than other fans because they're 38mm deep. Make sure you can fit them where you want - they are twice as thick as a normal case fan. I just wish they had an aesthetic that went with something else in my rig... they'd be better even if they were just plain black in my view.

Pros: I would be dead if my life depended on thinking of any. Zero. Nada.Zip

Cons: Purchased several. All are dead. Motors and bearings melt. Fan blades fall out on the floor. Impellers warp and blades scrape housing. These things just feel cheap and flimsy. Stay away from this junk.

Overall Review: Worst fans fans I had ever owned. If you love changing fans, get a few dozen of these, you will stay very busy.

Pros: At full RPM this fan moves a lot of air. But it's also LOUD. Like about any other fan though - at lower RPM is very quiet. At around 700 RPM (half speed) it's all but noiseless.

Cons: Over-stated dBA figures make this product useless where low noise level at full RPM is important. 18dBA noise figure is simply not true at 1400 RPM. It's because Silenx uses a non-standard noise measuring technique resulting in artificially low numbers. They measure noise at 1m from each of the 3 axes then take an average. The result is that when set side by side with other fans with much higher rated noise levels - Silenx fans are actually louder.

Overall Review: I used this fan for CPU cooling in my HTPC. For this particular application - it works great. Motherboard controls the fan so it shuts down completely at idle. At low load it spins at around 700 RPM which does not generate any perceptible noise. Should the system start heating up however - this fan is capable of plenty of air flow to cool things down. So far - full RPM has yet to be required. There are other fans that would probably do the job just as well but I wanted to try Silnx products for myself. I now know they are essentially not worth the extra cost. They very well may have "industry's best" noise to RPM ratio. But that doesn't make them quiet. Silenx needs to provide real noise figures because false claims will only result in negative reviews from disappointed customers.

Pros: In my experience with these fans, they are quiet (although not as quiet as advertised). For the noise produced, they move plenty of air.

Cons: Longevity. All of the SilenX fans I purchased for my silent PC build lasted no more than 6 months before bearings started to degrade and become noisy. Emailed about RMA's and I was told I would have to pay to ship them to and from.. For the shipping, I simply purchased new fans. Never again would I use these or suggest them

Overall Review: These fans simply do not last, otherwise they might be worthy contenders compared to other "silent" fans.

Pros: Its worth every penny.. It has massive airflow, (blow my hair around) and I can't hear the motor of the fan...!!

Cons: none that I know of

Overall Review: Its FAT (38mm vs 25mm "usual") so watch where you're going to put it. Sleek Design, looks like a turbine, I'm not using a grille because I want to see it!

Pros: a) Good performer, pushes lots of air. Not silent for this reason, but doesn't seem to have a mehcanical noise. b) Silicon mounts are quite useful. c) Right shape of a fan. d) Failure rate not higher than others. For example out of six SlienX fans (set of different models) five still run flawlessly after ~26000 hours of continuous load (I used then not for PC).

Cons: a) Overpriced. b) Non-standard measurement of noise level, which misleads unfamiliar buyer. c) "Chrome" look, which gives nothing but extra add-up to the price.

Overall Review: Nothing for now.

Pros: Moves massive amounts of air. Fits fine in my P180 case. Temp dropped about 4-6 degrees celcius.

Cons: Little louder then i thought.

Overall Review: THIS IS A 38MM FAN, AVERAGE CASE FANS ARE 25mm, MAKE SURE YOU HAVE THE SPACE!

Pros: Moves a lot of Air and is not loud at full speed. It comes with a 3 pin to molex adapter and Rubber isolators as well as screws. This fan lasted over 5 years of almost 24/7 operation in a dusty environment. Keep it clean and it will last a long time.

Cons: The finish of the plastic material seems to encourage dust to stick to the blades and internal body of the fan and needs extra attention when case cleaning. This isn't necessarily a Con, the Fan body is thicker than a standard 120 mm fan, this wide body design with steeply curved blades is how it moves so much air at a low noise level. Make sure your case mount will allow room for this beast.

Overall Review: When the fluid bearing eventually begins to dry out (in 5 yrs or so) the fan will make a vibration noise someone else reviewing described as a lawn mower. I removed the fan from the case and pulled the rubber plug on the bearing cap, put 4 drops of ATF transmission fluid in there just to see how it would work and put the rubber plug back and reinstalled in my case. 6 months later still going strong and quiet as the day I first put it into service over 6 years ago. I am more than getting my money's worth from this fan.