When I went to Carphone Warehouse to see a Nexus in person I WISH I listened to the guy.
He said LG are know for poor build quality - they get a lot of complaints and returns. He liked the Nexus but didn't think it will be smooth going being a LG phone and said I should wait....
He was right...
My nexus has loose buttons (power button has become loose with use), The side creaks/snaps as if something wasn't put together correctly.
The Sound quality from the mics on videos IS APPALLING !
Rear speaker is tinny, wosre than any phone I have heard TBH.
The camera could be better
The Battery is crap (if you use the features you are supposed to use like Google Now, Location etc)
The WiFi reception pickup is worse than any device I have owned.
The ear-peace has processor noise on it- especially bad when you take a call.
I really don't know what to make of the phone. It has its advantages too but in fairness its just not the golden ticket it was made out to be.