Nope not noticed any ghosting at all, monitor feels snappy/responsive for gaming
My first two had very bad back light bleed, 3rd one is a lot better, still some at the bottom left corner and a few other areas but in normal usage, it isn't that noticeable, only when you view a completely black screen.
Colours are superb even out of the box
HDMI shouldn't be used since it doesn't support any higher than 1920x1080 thus image is stretched. I use DVI-D, not had any issues.
I did a brief review covering more about the monitor, link in sig
Mine works fine with HDMI