Just thought I'd post this; I have an iPad Air, bought from the Covent Garden Apple Store on "launch day" last November. It's been a constant companion since then, and has worked flawlessly up until a couple of weeks ago. The battery indicator seemed to get "stuck" at 100%, even after ten hours or so of use, which was odd, I thought. Rebooting the iPad brought the battery counter to (what seemed to be) a correct level. However, a couple of days later, the counter dropped to 1%, and wouldn't charge any higher, and the iPad shut down if I tried to use it on battery (worked OK on mains AC though). Took it to the Apple store in Sheffield-Meadowhall on a Sunday lunchtime, it was packed, but they fitted me in (only had to wait 15 minutes), a Genius ran a diagnostic, confirmed the battery was dead (the diag reported "N/A" against the battery, which apparently means that the battery has left the building!). "No problem" says the Genius "we'll just swap it for a new one". And off he went, coming back in a couple of minutes with a brand new (Week 34, 2014 - August) iPad Air, which he handed over, then said "feel free to use our Wifi to restore from iCloud and set it up to make sure you're happy" which I then proceeded to do. All told, I was in and out of the store in under half an hour. I'm extremely happy with the service from Apple!