The only complaint is the weak compared to DSLR internal flash with my requirements. Here is probably deliberately reduced in view of the rather low battery capacity of XE-2. My limited experience is based on a short practice test.
Buy I'm going to the XE-2 but not because the picture quality differences for currently used by my Nikon D7100 is too low (high ISO) or non-existent. Also the Fuji-CMOS trans APC sensor can accomplish miracles.
I am waiting for a full-frame sensor in conjunction with a camera concept according to the XE-2, which obviously is yes at Fuji already being planned for 2014.. Sony currently makes the Alpha 7R ago (autofocus lame, no internal flash, boring design), which in terms of image quality currently possible (briefly tested by me). Here can not keep up the XE-2 unfortunately. Good full-frame sensors are still playing in another league.