I have all my electronics hide in a closet . in the summer the heat from the electronics make the closet maybe 20 deg hotter than ambient . I have hear about issue with PS3 's overheating , so i think a fan be a good idea . this unit plug in easily . the fan turn on when you have the PS3 on , and off when PS3 in standby mode . the fan be a little loud ; even more than this they seem to pull the internal fan out of balance . when the PS3 first start up with these fan go , you hear a harmonic vibration from the internal fan . this go away after maybe 45 seconds , then it be just a little louder than normal . when I do not turn on the accy fan , the harmonic vibration do not happen . I feel the extra air movement be enough to increase the lifespan of my PS3 . I be happy with the purchase .