It's Samsung best camera to date, everything has significantly improved from the NX210; Better sensor, better focusing, better high ISO, better design, etc. And you've got a great range of lenses for the NX mount but that's where the problem also lies ;
The only reason I never moved upto an NX300 (and ultimately sold up my NX gear) was the problem of finding lenses in the UK. Nowhere stocks them and if they do, they're roughly 50% more expensive than USA, Eastern Europe and Asia.
The only place you'll find real user information about Samsungs is the DPReview forum and erm, it's a little weird in that place.
