I upgraded my iPhone 6S to iOS 10 the minute it was published. That being said, I was really impressed knowing how awful Beta 1 could have been. Then beta 2 came out, some minor improves, beta 3 came out, some more minor improves, then that iOS 9.3.3 jailbreak came out, so I downgraded it just to get some snapchat hacks. 9.3.3 was so much faster! When Beta 4 came out, I was a bit reluctant to install after seeing all those unstable network warnings posted by people out there. Beta 5 came out last week and after I upgraded it from my jailbroken 9.3.3, boy it was fast and smooth, even compare to 9.3.3. Sure there may be some small known bugs, but for the most part I think it's stable enough to consider a GM, other than some known bugs. Should beta 5 be really close to a GM? assuming Sept. 7th being the big announcement date, I assume we will see another beta before GM. Any other guesses? Also how's Sierra for you? It totally toasted my 2011 iMac when beta 1 came out, though it was mostly fine on my 2012 macbook pro.