Summary: Bought a Microsoft VX-6000 a few days ago, thinking it would be the better choice since I like to use MSN Messenger. Unless you sit outside or have outside light hitting you, indoor lighting is not enough to get a good quality picture, it turns very grainy in low light.
Returned the MS one, and got this Logitech one... what a difference!!! Day and night difference! Not only does this one have way better resolution, but the quality is photo quality compared to Microsoft's webcam, even in low light environments.
Super happy with my purchase, this webcam is here to stay with me! :)
Recommend it over any other webcam in this price class!

Summary: I purchased this camera solely based on the claims of image sharpness. This is absolutely true for objects closer than perhaps 5 feet - down to 2 inches from the camera. But the camera cannot focus at all on objects farther than 8-10 feet. Too bad they don't mention this in the ads. For most folks who want to use it for personal chat - this is a truly great camera - you'll be very happy with it. That's why I gave it 4 stars. For me it was a disappointment.

Summary: Before I had purchased this webcam I was diligent in researching the product online and in the forums on the Logitech website. Without finding any major issues with it I ordered it and as soon as I received it I installed the software, plugged in the webcam, configured the audio features with the easy to follow Logitech tuning wizard, and rebooted only to find that I had no audio. I reinstalled the Audio drivers and I had audio for a minute moment until I had to reboot to finish installing the drivers.

To make a long story short, I posted my issue on the Logitech forum and was given a reply “Known issues. Please reference the floated \"Issues and Solutions\" threads for more information. Thanks” and after digging through several pages I find that it has been “Known” for over a year! So for the AEC “Acoustic Echo Cancellation” to function:
1. You need to lose audio functionality
2. Use something other than 5.1 audio
3. Disable AEC
On the same note, I did try using 4.1 audio and it worked for a short while and then lost audio again and ended up having to completely disable ACE. BTY, this issue in XP causes a BSOD.

Overall, the video is very good and it has some nice video effects if you have children, but I cannot justify giving any product a good review when a company sells their product with features that they “know” causes issues or has to be disabled for your system to function properly, which defeats the purpose of the feature you paid for. Remember, Logitech has known about this issue for OVER a year.