I have to say I am very impressed with the performance of the final version of Windows 8. It just runs great on this laptop. Microsoft has tweaked and tweaked this software and with every release, it has been a great payoff. I am so impressed with the performance alone that I am ready to use Windows 8 full-time. It really does run well on this laptop. Running the PassMark Performance Test the machine gets a 514.2 Below is the Windows Experience Index and you can see how its runs.
Overall if you are looking at going to Windows 8 on this machine I say do it. It runs great and I enjoy it a lot. Windows 8 will be available for everyone on October 26 so get ready.