Glad to hear you had no problems! I on the other hand;
-Updated my computer(twice, what's up with that?)
-Cleared everything off my iPad after syncing & back-up
-Only downloaded iOS 5
-plugged in directly to the back of my iMac
-Restarted my computer at least 3 times
Not necessarily in that order, still getting an error with no code. The only thing I haven't done is the restore to factory, which I will be doing tonight.
I gaze in wonderment once more at the Apple-mania which has gripped the Apple-world once more! Did nobody learn from their Lion experience?
My 'top tip' for ensuring a frustration free iOS 5 download experience is to forget it for now.
Allow the 'sheep' to clog up the Apple servers for a week or so before enjoying a fuss free download experience.
In the intervening days ensure that all those elements on your system which make up the iOS 5 package are running with the latest updates, i.e. Lion, iTunes, iPhoto, etc.
Now chill out, allow Apple to sort out the iOS 5 bugs and the servers to cool down, good luck!
The key problem I had during my iOS 5 update was in fact the firewall.
I kept getting the errors 3200 and 3014.
My computer is hiding behind three firewalls, and once I had turned them off, the iOS 5 update worked just fine.
Apple needs to access the ports 80 and 443 during the update, but these ports are usually closed by most firewalls.