My iPad Air has worked flawlessly since I purchased it. After the iOS 8 update, it barely functions on WiFi. I've resorted to using it on LTE most of the time as it is constantly dropping connections or running extremely slowly on WiFi. Same with my iPhone 6. I have an AirPort Extreme router and all my non-Apple devices are 100% fine. I wish I hadn't upgraded my iPad - no choice on the phone unfortunately- now I'm blowing through my cellular data when I have a 100mb connection at my house they can't use. This sucks ass. I hope Apple fixes this soon.