I’ve been running Visual Studio 11 Beta for a couple of months and now that RC is here it is time to upgrade. This was my upgrade experience:
Download Visual Studio Ultimate from: http://www.microsoft.com/visualstudio/11/en-us/downloads#ultimatew
I usually download the ISO, but this time I decided to try to Web Installer, so here is how it went:
Select the Web Installer and you are ready to go.
Agree to license terms: 
Select your optional features: 
And wait… 
About 6 minutes into the install, I required a reboot (I think that this was right after the 4.5 Framework was installed) 
After the restart, the installation resumed 
And 32 minutes later (including the download)…success! 
