Google on Windows Mobile..

I'm an Android user and I really enjoy using my Nexus 4 but ever since Nokia is bringing out some really nice phones I'm leaning towards a Windows Mobile. Especially after seeing the 1520 I said to myself.. this is my next!

My only concern is Google on Windows Mobile. I'm reading a lot of stuff about it but its still not clear for me.. What are the limitations/frustrations of Google on Windows Mobile?

With this I mean: how does GMail work? Why do people complain about YouTube while I see a lot of YouTube apps in the Windows Store? Same for Google Maps?

Should I be worried as a Google user for switching to Windows Mobile?