I just did it last night. I haven’t connected my controllers, but, the install was smooth as silk. Sim started fine and I was able to load all the addons I’d purchased from the Marketplace without issue.
(Albeit, install was rather slow for some reason at the start, but, after 8pm EDT it picked up the pace, so maybe they were doing some server work preparing for today and I got caught in that.)
Tonight’s install went very smoothly. I’ll be updating my other (new) machine later tonight.