What's Not Good
As great as the X100S is, there are still things that need improvement. The first of these things is the accuracy of the battery indicator. While I can live with the subpar battery life of the X100S, I find it much harder to live with the accuracy of its battery indicator, or lack thereof. Just the other day, the battery on my X100S went from what appeared to be full to empty in less than 30 minutes. To avoid situations like this while traveling, I make it a habit to fully charge my batteries each night, regardless of what the camera's battery indicator says.
The other thing that I would like to see improved is the focus accuracy. Even though the focusing speed of the X100S is improved, I find that it still has a tendency to miss focus. This is especially apparent when the background is brighter than the subject. In these instances, the X100S will almost always focus on the background even though the focus indicator says otherwise. For this reason, I would love to see the face detection system from the X-T1 incorporated into the next version of the X100S. As gimmicky as face detection may be, the system on the X-T1 seems to work quite well and would likely reduce the number of out of focus images of people (especially when the camera is handed to someone not familiar with the X100S).
Final Thoughts
For me, the original X100 was the camera that made photography fun again. It had plenty of quirks, but once I learned to live with those quirks, I was rewarded with amazing images. The X100S very much embodies everything the X100 was, but with fewer quirks. Sure it's not perfect, but no camera is. As a travel camera however, the X100S is as close to perfect as I have found. It is small enough to fit in a coat pocket, yet capable enough to handle almost any photographic situation I throw at it. To give you an idea of it's versatility, here are a few images from my travels with the X100S thus far.