Hi. i am very disappointed with this machine. i ordered and received a Surface pro 4 with i7 512gb, 16gb RAM last year December in the UK and about two weeks ago the device stopped charging and it couldnt even recognise the charger and as a result, the battery died and it wouldnt turn back on, leaving it as an expensive plate matt. I have both the official surface pro dock and the supplied charger that came with the surface pro 4 and both showed the same issue and couldnt power and charge my device. Fast forward to today when i finally received a replacement, that replacement they sent me is also broken. The replacement can recognise the charger from my dock and the official cable, but it wont charge the battery. The battery stays at 0 percent and now from an expensive plate matt, i know have a tiny under powered expensive desktop tablet... I am now planning to return the whole lot back to MS and want a refund. Sorry but this is just not acceptable at all and feel frustrated on a device that costs nearly £2000.00 in the UK. Yes i can request for another replacement but wait again for a week? and test again and reinstall again? no thanks. i dont expect this kind of issues to arise(twice) in such an expensive device.