Took me about 30 minutes to download and install it yesterday afternoon. So far, I'd say it's nice. Will take some getting used to with different features. I remember the most major upgrade was either the iOS 8 I think, and people freaked out over how much changed. Now we can't even remember what the hell the iOS 6 or 7 even looked like. It does feel faster. My battery on my 6s does seem to drain faster though. It may be that the phone is just running more adjusting to the new system, I read that happens sometimes when the new operating system is installed, so I'll wait and see if this battery thing remains an issue. I'm up for an upgrade in a couple of months so I'll be getting that 7+ then anyway.