I purchased this one in Feb 2014.
From beginning, i noticed flaw in display like backlight bleeding, ghosting and gradient banding and minor glitch with wifi.
Dell support replaced the display, after describing the issues; I appreciate dell for that.
But the 2nd display also has backlight bleeding (more than previous one), ghosting and gradient banding.
Display images -
http://1drv.ms/1wkOZaLBoth the displays are LG Phillips 156WF4 [DELL P/N: 890N5] [ID: LGD040E]
And now wifi reception is more fluctuating than earlier.