bill - 8:52 am on Oct 31, 2012 (gmt 0)
I wish I had a sacrificial computer to give the upgrade a go. All the machines here are put to good use and I wouldn't want to spend development time on 'making it work.'
This is the first Windows OS I have ever done an in-place upgrade. Apparently that's the suggested way to go.
I took an existing Windows 7 machine that had all my software and settings just the way I liked them. I upgraded to Windows 8 and all of my software and settings were retained. It was the easiest transition I've ever made between Windows OSs.
Normally I recommend a clean install of a new OS like this. Two months on and I have experienced no issues with my migrated setup. YMMV.