I'm aware people have had issues with back light bleed, motion blur and overdrive being disabled but I just received my monitor yesterday and so far I am very pleased with it.
Back light bleed on mine is minimal, especially when using the recommended brightness from tftcentral for the xb270hu @ 24.
With regards to overdrive, I tested using the ufo ghosting test and with overdrive at 'normal' you get very minor ghosting but a moderate amount of inverse ghosting. With overdrive 'off' there is slightly more ghosting (though still minor) but NO inverse ghosting. With this test I prefer the overdrive to be 'off'.
This is my first high end gaming monitor so I suppose anything will look better than what I was using. Any advice on what tests I should run to try and identify the 'many issues' this monitor apparently has, just encase I got the holy grail (or more likely I've become to accustomed to low end monitors to tell the difference between a good and very good monitor).