You will definitely wonder why you waited - internet access a hand's grasp away all the time is just so easy and convenient. I like the weather forecasting on the phone too, it seems very accurate. Always having a decent camera in my pocket has been useful. Translation whilst abroad, checking in for flights, games for the train, all in your pocket.

I had a corporate BlackBerry, didn't think I'd use it much, actually did but it's nothing like a modern smartphone.