Very, very sharp - it stood out among the display of discounted monitors just for the deep blacks and sharp, sharp contrast (unlike one of those curved monitors I was checking out - can't recall the brand - which seemed so faded and dull in comparison).
As far as technical issues, I haven't had a single one (and to boot it looks absolutely stunning, smooth, crisp, the whole nine yards when running Total War: Attila on top settings in max resolution - and I wasn't a fan of that game when I first played it on my laptop at ALL). Definitely a quality product - but then, I've ALWAYS gone Samsung for Monitors or TVs of any sort, they really do have the display market down-pat.