It's pretty good/stable for a beta 1.Of course, you will notice some lag, some 3rd party apps not working. But not that much that you couldn't use your phone.In generall, I would say it's the snappiest of all the beta 1 versions I have ever tried.Tested on iPhone 5s with update (not restore)
Topic:
App & System Services
SubTopic:
Core OS
Tags: