I have the card, though I haven't been "testing" it out extensively (classes getting in the way).
It is definitely very quiet, having no fan will do that. 😉 Temps I've gotten were 54 idle and 68 load using rthdribl, with the pipes and shader unlocked. Tried a little overclocking but didn't push it much.
Can't really say much else. It worked perfectly for me right out the box and I think it could overclock decently if I sat down for a bit and tried it. So far I've been playing UT2k4 and Call of Duty at 1280x1024 (maxed settings) and it's been blazin'. 😀 At least, compared to gaming on my laptop, which is beat by pretty much anything these days.