I installed lately at my friend's system, a program ( http://www.addpreview.com/ ) that adds to Google results page, preview thumbnails of resulted sites.
An additional feature provide link at Alexa's site. There you can see site general info and statistics, and users experiences and opinions for the resulted site. Seems to be very usefull, but I'm concerning about this company. McAfee Site Advisor, marked Alexa page as "Green" (=safe).

Anyway, I wanted your opinion. What is your experience? Is it safe to just browse at Alexa? (no toolbar downloads, no activeX and weird stuff).

Best Regards!!!