Ive had the X100 for a while now. On most occasions I will prefer to use my 5D3 with the 40mm over the X100, unless I want to travel really light. To me the 5D3 is so much better at everything. The X100 is fun but mine doesnt come out too often. IQ aside my biggest annoyance with the X100 is the exposure +/- dial. I cant tell you how many times I am shooting for a while then look down and see I have changed the setting by accident. Bad location I think. While I have seen some remarkable photos come out of it, I would say I consider it more of my point and shoot camera for when I dont want to lug the 5D3 around.