I got the iPhone 4s in November after having a blackberry ... And omg it is AMAZING!!! I love it, i use the calendar as my appointment book (it automatically syncs with my iPad at home for backup), I have 24hr access to salon geek, an app for my bank so that's easy to check on the go, I can send a text via Siri whilst driving if needed, the camera is 8megapixels so I can take, upload and edit pics wherever I am, I have maps so never get lost (I'm mobile), I get all emails business and personal, I can do my accounts on it, it's quick and convenient and most of all pretty straight forward
It's like having a pc in my pocket that can make calls too!