iPad Air 2 is one of the oldest still supported iPad by Apple with soon 3 years in work. I bought my iPad the day it came out and to be honest it has run fairly impressed on newer iOS than you do not expect to see. I wonder if anyone who updated their Air 2 to iOS 11 has something about speed. I am worried that it will not keep up with the new iOS, just like an iPhone 4 on iOS 7. Does the speed seems fine overall with small lags compared to iOS 10, or is it totally useless and buggy?