I have been keeping an eye on the bug reports straight from Apple's RSS Feed, and I am really sort of surprised that so many BUGS and problems are already popping up. Seems to be at least one or two a day. It is a safe bet to hold off for a few months until they all get worked out!
The problems range from hung systems at login, permission issues, account permission issues, invisible backup sets, inability to backup, and even a BLUE SCREEN after reboot. Yes the dreaded Blue Screen of Death, which is well known to Windows users. I see 12 problems listed over the last week. Thats just the ones that Apple has announced, and are able to correct. There are more than likely many more yet undocumented or misdiagnosed issues.
feed://docs.info.apple.com/rss/macosx.rss
