Summary: I Love this monitor!! I bought a Used(Like New) version. I received it 3 days ago. From what I can see no dead/stuck pixels and super color. I'm not a gamer so I can't speak to the performance of this monitor in that aspect.
Summary: For use with my Mac Pro late 2013 I ordered 2 of these screens to replace 2 X Apple Thunderbolt 27" inch screens. I could not find anywhere the answer to my question could I run both of these at 60Hz refresh rate.
Summary: I was leery about buying this from some of the negative reviews. The price seemed too good to be true (4K monitors as large as 32" are prohibitively expensive in April 2015). This monitor was everything I had hoped for. I can't see the individual pixels.
Summary: Wow! What a monitor. I have been using the Dell 30" 2560 x 1600 monitor, which is nice, but has some Power Down Mode issues. But this monitor does not have any of that. The upgrade to 4k was amazing! If you are even half thinking about it, just do it - you will not be disappointed.
Summary: It's gorgeous! It's like having a giant MacBook Pro retina screen in front of you. Since I spend as least 12 hours a day looking at code it's well worth the investment. Prices will likely drop but $1500 was the tipping point for me.