Just received my X100s 2 days ago !
My initial impression is good, but I foresee a bit of a learning curve to extract the best images out of it. The issues with RAW conversion from the different sensor will hopefully get solved soon. RPP supposedly gets the best detail out of the X-Trans, but the x100s is apparently even different from the Xe-1, and the X-Pro. RPP will not open any of my Raw files.
Even technically, my images (jpeg) do not (yet) look as nice as the ones I have seen on the Web. I was hoping to see a substantial improvement from my O-MD files. But we'll see...