I downloaded on Tuesday evening when it first came out. I now have it on the two desktops and laptop.
It seems to work just fine with 90% of the sites I have visited. Some sites have had functionality issues, but I think these would be ones where web page coding may not comply with standards, sites for kids games etc.
On a functional aspect it does seem to be quicker than Firefox or Explorer. I've noticed sometimes it is slow to recognise a right click for a new tab and there have been several "halts" which continue after a few seconds. Then again it is a first release Beta.
Overall I'm impressed. I like the minimalist look. Also something I like is the ability to pull web applications onto the desktop and leave them there as icons. I currently have Google mail and Google Calendar as desktop icons. Now can access them directly without a broser interface as if they were applications on the PC instead of the "cloud"