I did my phone and iPad. The iPad seems to be an improvement in resolution (maybe I'm imagining it). I also subscribed to iCloud for my music hosting and I'm very impressed so far. It's $25 a year but I can stream my tunes/podcasts/videos to any enabled device. I like that feature.
The Facebook integration is a concern as I don't do Facebook and find their draconian hooks into contact lists fucking annoying. I have that part disabled but don't trust it yet.
I'm not much of a gamer but the few I have I use to play with friends over the Internet. There's been a growing trend of Facebook only Multi player functionality too, which royally pisses me off.
Crusader of Slack