It's been fantastic so far. The camera is amazing in both still photo and video modes - enough that I've actually made more money with the camera than the phone cost - plus the 32GB of built-in storage plus SD card (currently have a 200GB card plus a couple of 128GB cards), good battery life, and plenty of power/speed makes for a great experience.
I have one phone, and have never understood other people that have more than one; and also don't understand people that buy regularly new phones despite their current ones are just fine (I live in a country where you don't get bamboozled with the two year subscription plan with phone companies).
Before Christmas 2012 (I think, more than Christmas 2013) I had a dumb phone; and always had owned a dumb phone. Until my brother decided I couldn't be seen dead with a dumb phone in my school so he bought me iPhone 4 --- and I never thought I would say this, but I can never go back to dumb phones. If my iPhone 4 ever breaks then I'm never going back to owning a dumb phone; I'm always going to go with smartphones now - whatever the os