So far, still enjoying the X100S. I really do enjoy the OVF in good light, like outside, etc. In the house, I switch to the EVF because it easily misses focus with AF in poor light (very dark inside the house, bad tungsten light, etc; find with window light). Being able to quickly switch to manual focus with EVF and focus peaking allows me to get shots in very dark light easily. I like how small it is, light, simple to turn on and just shoot with a custom profile I have for indoor and another for outdoor so I don't have to reconfigure the whole thing for my needs. I'm shooting RAW+JPG right now just to get used to how the JPG output is, and to have RAW files to mess with just to get some experience there. Learning to use Silkypix. It's clunky software honestly and the conversion process is slower it seems. Definitely would like to find a better RAW converter/editor in the future. But so far, the camera has completely replaced my EOS-M and pancake and I have no regrets about the switch. It focuses much, much faster than my EOS-M ever did. The silent leaf shutter is probably my favorite thing about it too. And the flash works so well and with the leaf shutter, syncing is so simple without tons of specialty lighting gear. It makes doing shots a pleasure. The files are nice. I like Fuji colors even though I'm doing a lot of B&W with this camera (I absolutely adore the whole family photojournalism thing). Lifting shadows is pretty good, not nasty. Manual focus is easy, the lens has good focus throw (relief!).
Things that are not so hot. The EVF is definitely laggy and not great. It works. I prefer the OVF. But inside I have to use the EVF or I'll miss shots and get composition off a little and I'll never know what it was even focusing on until I take the image. So indoor, I'm using EVF with AF and with MF and it works. But, I was disappointed with the slow laggy EVF. The battery life is terrible. I have 4 batteries now and I take at least 2 with me everywhere. I'm used to being able to have my camera on at all times, and the battery last literally all day. But now, with this, I can take some images, review a few things, maybe go for 2 hours tops and I'll start seeing that a new battery is coming up soon. So for extended outings, cannot forget to bring all 4 batteries. The 23mm F2 lens is nice, but it's a little soft wide open (sharp enough for me to enjoy but I can definitely tell its softer than my previous 22mm F2 pancake lens). F2.8 is plenty sharp. F4 and down is very sharp. I'm generally parked at F2.8 though inside, F8 outside. Flare performance is ok, not great. While the leaf shutter is a blessing and I love that, it also requires clunky operation when you go from dark light to bright light at fast focal-ratios without a simple way to switch a profile that already has the ND filter enabled. So I have to consciously remember to turn the ND filter on when I'm outside at fast focal-ratios. I definitely wish there was an ISO dial so that I could keep the ND filter programmed on Fn and still have quick access to ISO without having to press key commands a few times to get to it (Q, move to ISO, etc). I'm now using auto-ISO more and more to avoid having to get to it. Seems to be working ok and I'm getting used to it.
Lights: while this isn't my intended use, I had to try it with various lights, and I'm very pleased that it can trip and sync my YN560III fleet and my Rovelight 600B with the 560TX controller and/or the RF603 transceivers. They're generic to systems and work flawless for me so I have leaf shutter sync with them and a built in ND filter making outdoor fast-focal ratio lighting in the sun really simple and easy. Love it. Makes me want a leaf shutter and an interchangeable lens (I know this doesn't exist in smaller formats, so, oh well). Definitely happy that I can use my lighting through with this camera, regardless of it not being its purpose.
So far though, I'm liking Fuji. More and more I'm eyeballing an X-T1 ($500ish) in the future to get access to the 56 F1.2 and the 10-24 initially. Fuji isn't coming close to replacing my 1D system and long glass. But Fuji fits in nicely for my shorter range stuff and lighting work. We will see! It's only been around 2 weeks, still need to put a mile into it.