Dustmaker Mike
My daughter broke her 3G a few months ago so I gave her my I phone 4. I upgraded to the 4S at the time. I like that it appears faster then the Iphone 4 and it says it is running 4G (I doubt it is) but the hype about Siri and being able to talk to it to have it do things I don't get. I asked it maybe two questions and have not thought about it since.
iPhone pluses

Same Charger and program used thought entire product line

Upgrading to a new phone transparent it just changes everything to the new phone

Lots of support can be found on line and off line

Down Side

I tunes

I cloud

If you do not already have an Iphone then look between the Droids and Iphone

Which carrier do you use? On ATT Iphone work Great but on Verizon I have heard of problems with them.

Good Luck