I just did the update and wow, what a difference in speed. Opening apps and switching between them is so much faster.
The flash itself went smoothly and rather fast. I was surprised at how fast it went. In some of my previous posts i had complained that the NSU was just freezing at the startup screen or when it was trying to find the phone. For those with the same problem and running WinXP, on your PC go to start>run and type in "msconfig". On the startup tab, click "disable all". NSU should now run. At least it did for me. After the flash, you can go back into msconfig and click "enable all" and your pc is back to where it was. Something was conflicting with NSU and it just couldn't see my phone at all. Stupid Nokia tech. support couldn't even make this simple recommendation.