The latest PB (3) is making my iPad Air 2 tick as I type this and it works just fine. The issues people can be experiencing now are mostly related to some third party apps that have not been optimised for iOS 11 yet. So it depends on how you use your iPad. The changes to the keyboard, the new dock and new multitasking features are well worth a try, plus you can always revert back to iOS 10.3.3, if needed. So far I have had a great experience with it.