I love it! Best OS I've ever used. Butter smooth on my Verizon iPhone 5. Zero lag. Everything loads two or three times faster than before, including websites on Safari. I couldn't be happier with this upgrade. Not a single hiccup. I'd change nothing about it. Extremely intuitive. Super convenient to turn on wifi, Bluetooth, and a load of other features from the top and bottom dropdowns. I heard people complain all day. I have none.