[Noir]

I will say a few things
it does work out of the box and its stable. But then, when comparing the 3gS to the 3g (or even 2g) platform, there aren't many huge differences.
Preference aside for my joy of windows mobile, I'd get the 3g and not the 3gS just because it is much cheaper than the 3gS and has almost as many bells and whistles as the current model. My suggestion
iphone 3g