A quick review after using it for a week:
PROS
1) Love the colours + bokeh for a camera this (physical) size!
2) Good low-light performance. Though NR is aggressive; soft looking images. However, cannot complain for compact size cam.
3) Viewfinder! More comfy + stable position to shoot in; akin to DSLR.
CONS
1) Very clunky / non-intuitive interface. Can't beat Nikon Canon interfaces. Throw it to a random friend and they'll pass the cam back to you in 1 min... too difficult to navigate...
Well that's interesting. The Fuji's interface is similar to both current Canon [Q menu wise] and Nikon [Settings Menu] interface. Though it's not the best I've seen but definitely not difficult. In fact it's better than the old X100.
2) Weird controls... IMO at least. Don't like the shutter speed knob, EV knob and how the Left-right toggle functions. Would prefer controls of a typical DSLR. Especially missing the rolling-ratchet thumbwheels on your DSLRs. Hope there's a way to re-map the controls to our own functions?
Ever used a SLR or Rangefinder or any old camera back in the film days? Those had similar knobs. Some users even buy the Thumbs Up to replace the feel of the film advance lever present on old film cameras. I do agree that left-right thumb lever thing is silly though. If you want DSLR type controls, why buy the X100S in the first place?
3) Even in decent lighting, AF is a little slow, when compared to my oldish D40
The AF is pretty fast, but isn't consistent, that's for sure. Performance drops mainly indoors and at night. But fast enough for candid shots. The only mirrorless camera that I've tested to be as fast or faster than a typical DSLR is the OMD I find.
4) Shot-to-shot delay is irritating. 0.5 secs at least. My D40 allows me to snap and take the 2nd shot very quickly. The X100s? "...saving file" zzz... Used .jpeg Large. Other settings seem slower! i.e. RAW / smaller file size jpegs.
Sounds like a slow SD card you got in there? I don't really have that issue. Or maybe you have a faster trigger finger than me? You can use burst mode on the X100S if you want to take frame after frame rapidly. It's not the best, but it works properly unlike the X100. FYI I used to shoot RAW on my X100.
5) Full auto settings are wonky. Sometimes good, sometimes overexposed. D40 seemed to nail it 90% of the time.
I don't know much about that. I have not had any issues with the auto mode on my X100. Never used auto mode on the X100S yet (usually use it only if I want a passerby to take a photo etc) so I can't comment.
6) Battery indicator not accurate? It was 3 bars (full) then dropped to 2, 1 and flat in less than 50 shots... Any way to calibrate the battery level indicator?
Common issue since the X100. I don't trust the battery meter on my X100 and X100S. When it goes 2 bar, it may run from 2 to 1 to 0 bar very very fast. That's why I always turn the camera off when not taking a photo and bring along an extra battery just in case.
7) Fixed lens. Indoor room shots are tricky, outdoor landscape shots too. I miss my 18-55 lens... Ok, I'm lazy to leg-zoom
Get used to it. Millions of people already have. Even the average joe with a smartphone has gotten used to a 30-35ish mm fixed prime lens on their phone. (the zooming is bogus, it just crops the picture)
Still learning how to maximize this cam. Fellow users, pls share your tips

Thanks in advance!