Just got my system upto F 12 today (11.92 actually).
Everything works. The installer played bug free, nouveau is looking good (do i need kmod-nvidia anymore?)
The new network manager interface looks awesome. I noticed some improvement in bluetooth too. Anyway, it's just been half a day. More features to praise and more bugs to swat as we go on!!
With just a few days left for the final release, I'm sure this one's going to be an even bigger leap than Leonidas. Go Constantine!!