I too joined the line of users with a modicum of trouble in the update. Initially both my iMac and MacBook Pro (early 2008), failed in the 888 mg update to OSX.7.2 several times I was prompted that there was an "error can't save file." ( Haven't tried to update my early MacBook Air yet).
So I unchecked one of the update items, and I downloaded and installed the two updates separately, and everything installed just fine. In fairness to Apple, I was overloading my wireless home network to do that, because I was running printers, surfing the web, and streaming music over the network, while I was updating both computers at the same time, wirelessly.
My phone (iPhone 4) updated seamlessly, even though it took nearly an hour. I plugged it in, and it did what it was supposed to do.
When it came time to use my new features, I had minimal problems connecting to my homeShare network with Airplay, but again with minimal effort, and a re-try it connected to all 5 pairs of speakers in the house. I had to re-enter the speaker passwords, and it was fine. I haven't figured out how to stream from my iphone to multiple sets of speakers at the same time over the network, like I could do from my phone, before, but suspect that will be easy too. Sharing Movies over the network on my phone is easy, seamless. Typical Apple, you don't need an instruction manual to make it work, it just does.
I was somewhat concerned about my MobileMe and my Apple ID accounts being different, but the log-in recognized me, and everything works, from the store to all my accessories.
I'm currently experiencing a delay switching the MobileMe account to the icloud, but it's just a busy server, and the notice just said, "try again later."
All in all, for me, this has been another successful Apple Software rollout. This was easier for me than the software rollouts that we used to experience at the large teaching hospital that I worked at for many years.
Apple really does ( overall) a good job executing product rollouts.



