I have tried it on this blog. Easy peasy to upgrade with no glitches. I don’t have time to check out what’s new yet but one of the feature I read is ‘No more broken pages due to plugins incompatibility’. That’s one good news cos how many times have we seen our blog disappeared because of some bugs in the code?
The other thing is the ‘Deactivate All Plugin’. I have a long list of plugins and it is welcoming to have a one button. But you need to Activate one by one. This is to help you identify which plugin actually cause the problem, in case there is any.
You can get the download link from WordPress.