Superb choice! Got it, tested it in good light and low light, and get very good image quality, animation, and sound quality. Face recognition and autofocus work well.
No trouble regarding Windows x64 whatever with Logitech driver 2.51.
Would choose this again!
Note: The new driver version, released just last month, no longer includes - unneeded - face gfx features like alien masks, animal heads and face distortions and such gimmicks. No loss anyway.