Oh the speed boosts are absolutely insane. iOS 11 made the iPhone 6s Plus a miserable experience, even with the 11.4 update. Installing iOS 12 Developer Beta 1 was like the phone drinking from the fountain of youth - it has become such a pleasure to use the device again.

If you're interested, I wrote an article yesterday going into some more details about some of my favorite iOS 12 and macOS Mojave features!