It was a relatively painless exercise, though I was trying to do it unattended, which naturally enough didn't work due to a few custom configs I had.
I'm used to Ubuntu upgrades wreaking havoc on my graphics settings, but this time everything seems to be working as before.
It's interesting to see that the Ubuntu developers opted for the beta release of Firefox rather than a stable one.
Of course I've only had the new install up and running for a couple of hours so far, so there maybe issues and new features that I haven't spotted yet. No news is good news!