We have to give it to Samsung: they release interesting cameras and lenses. I have been disappointed with the quality of their electronics in other segments (I'm thinking about phones mainly), but their camera division seems to strike a good balance between quality and price. It's unfortunate that they are completely invisible in the market: they might have forced the Japanese companies to become more competitive.
In fact, they are so completely unknown that I've noticed some people on forums and blogs mention how Samsung's NX line "copied" Sony's NEX, despite the fact that Samsung released the NX10 before Sony NEX-3 and 5, and with better initial lenses. Had Sony not released their "magic" 14 and 16 megapixels sensors at the same time, it might have gone differently.
I think it is a key problem that cameras are just a side thing in the Samsung portfolio.
Technically their base situation was similar to Sony but Sony's marketing was far more aggressive straight from the start.
Samsung should have acquired Pentax to obtain a certain degree of glory - just like Sony did with Minolta.
Samsung's 20mp sensor is actually very good and not inferior to Sony's 16mp sensor.
FWIW ... the NX cameras aren't even available here in Australia ...
On the downside, this is a bit of risky path - achieving an excellent IQ is challenging based on these specs.