Kingwin 120mm Fan Review @ OCC
 

The mounting system was nice because it was tool-less, but also difficult because they were tool-less. Because of that, It's hard to say whether it really benefited the fans or hurt them. Nonetheless, the rubberized material made the fans sit quietly up against the metal of the case, which was definitely a plus. The general fact is that the fans were quiet and cooled rather well – this alone makes them a decent product. Overall I liked the fans, but I would prefer the old school screw mounting system.

http://www.overclockersclub.com/reviews/kingwin_fans/