Just got my 7th unit, this time from Best Buy. Bright dust specs under screen, large hotspot on left side of screen, large pink discolorations. Also, the light was noticeably dimmer than the previous units (max brightness on this unit was equivalent to about 18 on others). Ironically, this device actually had the most even lighting on the bottom (no blotches).
Going to exchange for another and will report back.