Pros: Just got these guys installed on my Corsair H100 (not the H100i.) Previously I had two scythe SY1212SL12H slim fans installed.

In their current configuration they are pulling, and I also have two regular size blue LED GELID fans (with the nanoflux bearing) pushing. Both sets of fans are horizontally mounted. I require the slim fans on the top because of clearance issues with my motherboard, and I don't want fans mounted outside of my case.

Temps on my Intel 3930K are around 27 - 29 C idle. (I don't have it overclocked), and 43 - 44 C under full load. Previous temps with the scythe fans were 32 C idle, and 46 C under load. Not a huge difference, but What's really nice is the noise level. They feel like they're moving a lot more air than the scythes as well, despite the grating along the radiator mount.

I honestly can't hear these or the other GELID fans while my computer is on. Now granted I have about 16 fans on my setup, not counting the video card, but The scythe fans used to really let me know they were there. They had a high pitched whining noise that was unbearable unless you made them sit at 75% or less, even then, they weren't completely without that whine.

The blue LEDs are nice to look at, but if you don't like them you can turn them off with a switch on the fan (I believe that's what it's for). I didn't try this as I just mounted them straight from the box to the top of my radiator.

After getting these, and using other GELID fans for about 8 months, I have found my new favorite brand.

Cons: Haven't owned them that long, but no cons so far. If I find any I'll write another long winded review stressing my discontent. :P

Other Thoughts: If you're like me and don't have the room for a full size fan, or just like a slimmer profile, you'll love these fans. They don't quite have the static pressure or CFM of the regular models, but for what they offer, and how slim they are, they are more than worthy. I'm convinced if I had slims on the bottom my performance would still be pretty good.

When I get the itch to start overclocking, I can be sure I'm in as good a place as I can be. (You know, without donning the gloves and pulling out some liquid nitrogen.)

Props go out to GELID for thinking of those who need slimmer fans, and then delivering them with unparalleled performance.

Pros: Looks cool. Nice blue LED. The second fan twists however you want it. I couldn't hear it over my other components.

Cons: I can't really dock eggs for this, cause it's my setup that's causing the problem, but if you get this, make sure you have enough room between this cooling card and your graphics card. I only had a single card's width of space between them and the exhaust on this thing was fighting my MSI Twin Frozr III for air. Temps rose in response. Unfortunately my sound card was occupying the single regular PCI slot on my motherboard that was in the way and could not be moved to facilitate proper air flow. So I gave the cooler to my dad, and he says that with his setup(which has a lot more room between the cards), it is working flawless.

Other Thoughts: I ended up mounting two 40mm fans (for exhaust) on the outside of my case over the open card slots instead. Worked like a charm. I used two of the EVERCOOL FAN-EC4010M12CA. Newegg sells them for a lot cheaper than I paid at a local store, so I'd suggest getting them from here.