SQL Server Virtual Labs - fully featured virtual environment for testing!
Virtual labs - in simple words its simple to use where a pre-installed environment is setup to try out /test SQL Server installation for your databses upgrade, that has full-featured labs. Not only this you have an option to download manual with a 90-minute block for each module if you are not sure enough. All you have to do is sign-up (free) on Technet center.
I would encourage many of you out there to try them at your own time, even though you are experienced or have access to setup whatever type of testing environment you would like to setup. I always get to go there and few below are my most visited ones when I want to test a specific test out:
Featured labs to upgrade your complex database or get practice to know in-and-out of Upgrade process, first 2 labs are best ones to choose.
Featured labs for Clustered environment.
Recently I have been using this to get to know about BI upgrade process.
TechNet Virtual Lab: Business Intelligence – Upgrading Analysis Services to SQL Server 2005 Analysis Services
Take your time to go through all of the labs featured in Technet-labs