I was able to exchange the power supply to my 2nd Xbox One and it is really quiet like my Day One Edition console. The console is also whisper quiet like the launch system which was a big relief to me.
I really like how all I had to do is put in my email and password and it downloaded and set up my UI just like I have on my main console. The only issue at times is when I play a game on earthier console, when I go to the other one and play the same game it has to do the game save sync, but at times this takes a little while depending on the game. Forza 5 seems to take the longest, but I learned that if I hit "cancel" and then resume it, it does it really quick.
Overall though, even with the sync issue, it is pretty cool how they set it all up and made it so easy to run 2 consoles.