I recently bought an IPP 10.5 for notes taking but after using it for several days I noticed that the color temperature shifted from top to bottom.Got it changed for THREE times,manufactured dates varied from September 2017 to March 2018,locality of shipment from Beijing to Xiamen and problem remains.I think I'mma keep the last one as the problem is the mildest,though it got some light leakage problem on the edge.I guess Apple's well-known precise quality control has long gone anyway.