Pros: After trying dozens of fans,. found these to be one of the quietest. Puchased multiple of these throughout the years, all of them still work.
Cons: Wish they were quitier. Had to invest in fan controllers to reduce the speed. still no over-heating issue. When running multiple of these, still audible from 4-5 feet. Wish newegg but these on sale more frequently, got them usually around $8-9 range.if you don't mind waiting months at a time to save a few bucks
Pros: I have four of these in my CM Storm Scout II case. Two on intake and two on top exhaust. They're never at 100% simply because they keep everything cool at much lower speeds. There's no sound to speak of, my DCII video card fans are louder than these (whisper)
Pros: EXTREMELY quiet. You won't hear it if it's the only fan running. My graphics card makes more noise. It's also really good with airflow. I don't have much to compare it to, but it hasn't disappointed me yet.
Cons: Not really a con.... but the color is sort of ridiculous and no LED's makes it even more obnoxious. I get it, it's their trademark color, but it looks laughable.
Summary: Stay away from this product. Even it is free with rebate, don't waste your time and money.
Pros: Creates noise
Cons: Less than 2 months and fan already making noise. What a joke. Better joke, I am still waiting for the rebate, what a rip off. I wouldn't have bought it if it wasn't for the rebate...what a waste of time and money. Look for something else... don't even try like I did.