Well the update was painless, no hidden surprises or complications. Haven't come across any bugs yet and performance is noticeably quicker.
Some people have reported trouble installing some paid for apps from the market price. I can't test this because I am a tight git.
It wasn't an easy install for me, and I had to search around. Despite following the instructions as directed.
If after installing the Sync software and it wont work or recognise the phone, it is important to switch off the phone and take the battery out. On reboot, it should work.
So far, so good. All works well, it is as smooth as better and almost flawless. My only issue as it stand at the moment is the paid apps that wont work - well cant seem to find them in the market place. [This happened before when I changed from the G1. . . but it some how sorted itself a few weeks later]