I own iPhone 4S since October-November 2011. It is the first proper smartphone I own. The main reason I chose it was because it is a standard mobile in my company.
It took me a while to get used to it, though I still have problems - it warms up quickly. Perhaps I only recently learnt properly it's advantages when I went to a holiday - it is easy to change the keys from English to another language to write emails, easy to access email that I stopped using a laptop to check emails. In fact, I walk with my phone in my pocket at home instead of coming to my laptop, it is very convenient from this point of view (though I believe any modern mobile will do it). Siri - I find it quite annoying because it does not understand me properly, perhaps because of my accent. Also quite annoyed that I cannot simply drag and drop files into or off the mobile, do not know what files I have on the phone and cannot watch free films from websites except youtube. And it does not cache whole online films – I usually open a film on a laptop until it loads up and then watch it without interruptions, but I cannot do this with my iPhone.
I was told that I can get all these benefits on Galaxy Note and I like large screen of Galaxy along with stylus. However, I am also thinking to get a tablet Galaxy because larger screen will let me read more from it. Plus a tablet will be much more convenient when travelling than a laptop.
At the same time, my wife absolutely loves her iPhone 4S and would not want any other phone – it is fashionable, it works well and she has all apps she needs, i.e. many free games J