As an 8x owner and Google user, I can say it does work. Replication can be a bit slow as Google has moved away from PUSH technology (ActiveSync) to PULL technology (IMAP).
I would recommend the ATIV S first, then the 8X, then the 920. ATIV S gets the win for the non-capacitive "start" button, the OS is fully unlocked, you can plug SD cards into it, and the T899M variant supports AWS and AWS LTE. (Important if you are on a carrier that uses it). I rank the 920 last because the design sucks. The back isn't curved, and it is fat and not comfortable to hold. There are a lot of people that love the design of the 920, but I find the 8X design to be superior.
hope that helps!