I've been running the RC since it was released and have just switched to final, 20 minute install from start to finish for me and as expected no problems of any kind with it - Haven't seen any major problems that some others are experiencing (either with RC or final), no slowdowns over time, when wiping the RC earlier the system was damn close to as fast as the day I installed it.
Just to address a few points made by Michael C though...
4) even LESS options for backup, including that now you can only keep 1 system image at a time
Not sure where this one comes from, the backup tool clearly gives you the option of only keeping one image at a time or making use of it's available space (it seems to max out at 4 images no matter how much space you give it so certainly could be configurable to allow a set number, but having more than one is a case of simply setting the option).
6) Task manager still sucks. they bought Sysinternals YEARS ago, yet nothing has moved from procxp to taskmanager yet...
Curious to know exactly what you're missing here - procxp's system info monitor is covered by taskmon's resource monitor (the resource monitor is actually much better than that included in procxp) and most of the process details provided by procxp are available in taskmon by simply enabling them (view > select columns) along with a fair bit of info that procxp doesn't give.
8) no equivalent to quick launch bar anymore
The fact that MS have removed this by default in favour of pinning is annoying, but it's very easy to put back to function exactly as it has on previous windows versions - Right click the taskbar, go to toolbars, select new toolbar, and add the path of the toolbar as "%userprofile%\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch" - Okay it, and bam, you have your quicklaunch bar.
13) still no automated checkdisk/defrag functions
Defrag tool has a scheduler built into it, don't quite know how it's possible to miss this. Automated chkdsk is still missing, but frankly i'd say this is hardly crucial.
16) still no virtual desktops, yet again staying at least 5 years behind all the other competitors.
Granted it's not embedded into the OS and available by default as it should be and it's functionality is a bit limited, but MS have had a sysinternals tool available to allow virtual desktops for quite a while, available at: