I'm curious to know how good these knockoffs are for the iPad Air? BoxyTech masquerades these as the genuine Smart Cover and Smart Cases but I'm pretty sure they are selling knockoffs from China at a cheaper price: http://www.boxytech.com/apple-device-accessories/ipad-cases-cover-stand-accessory/ipad-air There's even a 10% off code. I really don't want to pay Apple prices for a flap so if these knockoffs are decent, I'd consider them. Also, has anyone tried the iPad Air smart cover knockoffs that have the metal spine? I don't want to be scratching my iPad so curious to know how well they work. Thanks!