haha, wondered how long it would take before you guys started going nuts about Xiaomi. I've always been a fan since I bought their first M1 phone back in 2011, but I think they have gone too far now with their apple cloning. What is odd is that unlike many chinese manufacturers who start as clone makers, xiaomi became a multi billion dollar company before they really started apple cloning. The mipad and the Mi4 being the most brazen clones to date. Prior to this they hadn't really made a phone or tablet that resembled an apple product although I suppose it could be argued that MIUI was always very apple inspired. But again with the introduction of V6 for miPad that's when we really started to see them aping iOS very closely. Now they have basically stolen apples whole marketing, language, presentation style, website style, Manufacturing process, brand ethos, etc etc. Very bizarre, I actually find it a shame that they felt they needed to do this, had expected something more original from them to be honest as they are a genuinely innovative company in my opinion.
Despite their cloning they do still make quality low priced products. I'm still trying to figure out whether i can justify buying a mipad, the omission of GPS was slightly disappointing though and knowing xiaomi, despite the good reputation of MIUI, I bet the firmware is basically beta as with most xiaomi products when they launch. Wouldn't hold your breath for an android L update either as they are very slow with proper OS version updates. Mi2/2s owners are still stuck on 4.1 with not much hope despite the capable hardware.
With regards to the One Plus, Mine does have the yellow banding, it pisses me off a bit but don't really want to attempt to return it as it's not really a major issue. As James mentioned, a fair few people on the forum have said it disappears over time, others have suggested putting it under UV light for a sustained period also alleviates the issue. With regards to the colours, cyanogen includes a useful screen settings app where you can adjust saturation, hue, contrast etc etc which is great and allows for deeper blacks.
Also check out Andy from gizchina's Vivo Xshot review if you haven't already. A real chinese powerhouse...