Considering a Boot Camp to Win 7 or 8 on my Retina MBP

Hello All:

I'm considering installing Windows 7 or 8 on my 15" Retina MacBook Pro. How do both OS's perform on the system? I'm sure Windows 7 is a more mature product to install on this hardware, but I'm also curious about running Windows 8. Any experiences with this would be much appreciated.

Thanks!