At present the overall concept certainly the best

I switched from the X-E1 on the X-T1 and am completely satisfied with it, professional much to do I Scan intensively for 30 years and had also with graphics and presentation of images.
I have this year in January final of the heavy bulky SLR's adopted (my last was the Canon EOS 6D) and I can only say the Fujifilm X-T1 does more than the SLR only to compensate them, in my opinion far superior,
Of course it has like any techn. Device small vulnerability details, I will not elaborate, the non-slip knobs on the back, etc .. (these trifles not bother me) who are indeed mentioned by other reviewers enough
For me, it's the overall concept and the image quality and because it is absolutely superior in my opinion, all other cameras.
Addendum:
I have now spent four weeks in SW France with the X-T1 and the new 18-135 mm lens and a 27mm 2.8 prime lens I can say that was in practice the best combination I have ever had, I think it for Yesterday SLR technology is time to say goodbye to the market. I definitely do not have brought good to the man glad my last SLR's.