well win 8 killed my winload.exe on my 7 partition so that was cool......
If you have a dual boot, make sure all your items are backed up on your primary OS (7 for me). Recovery console was able to repair the issue for me, but I've had issue in the past that weren't so easily repaired.
Not a fan of the home screen right now. still getting familiar. I do like the calendar feature a lot (small but good part). I'm having issue with my xbl account getting snyced. I have an email for that and another one for general use. Not sure I want to link my accounts through email, would rather have some other option. I have NOT fully explored that, so I'm probably missing something. I would prefer the tool bars to be accessible throughout the entire edge instead of just at the corners.