I'm using this since I bought it b4 GST. So far so good.
Fan is silent except the time when I left my game on for too long in the background while watching video, and there's a sudden spike in exhaust output hahahaha
The laptop gets hot fast but cools down very fast too. (probably due to the material?)
Oh wifi card is a bit weak. (probably due to material also?)
Comparing with my friend's Y50 and another dell 7447, I think most performance laptops can't run from heat problem ~.~ (not including custom gaming laptops from illegear etc)

Oh the build quality and speaker is superb =D
Satisfied N-series user now. They should bring in more models from the series.
My friend spent 4k+ for his Y50 but now he forces me to open movies on my laptop every time coz he thinks his speaker is just too muffled/pathetic.