I picked up a sim free 16GB Moto G on Saturday.
Very impressed so far.
It's gonna be my development device, i'll keep my S3 for day to day usage.
The Moto G once updated to KitKat uses the new
Chromium WebView which promises better WebView performance especially when javascript is used.
It also gives the option to use either the default Dalvik runtime or the new 'still under development'
ART runtime.
Again this promises better performance.
All in all the Moto G really is great value for money.
Martin.