If you have got a 3g/3gs or it's your first IPhone i will say that the new 4s will be really a great phone. If you have come from an IPhone 4 then it's a harder decision to make. I thought about getting a Galaxy SII and then i thought no i'm being really stupid. For me the screen size was the only issue and i'm not willing to trade all that the IPhone has just to get less than an extra inch.