Niestety (mimo wielu plusow tego systemu) minusem jest AF w scenach dynamicznych i tu nie ma co zaprzeczac , nawet sam FujiFilm do tego sie przyznaje -> link

"And of course focusing is a challenge - we need a faster focusing system."

"[Looking ahead to the cameras that will replace the X-T1 at the top of the X-series lineup, what is the biggest thing you want to improve?]
The key challenge is how to improve autofocus."

"And as we move into the telephoto lens area for wildlife photography and so on, those customers definitely need a better autofocus system. Just introducing a telephoto zoom is not a solution. Focus accuracy and speed has to be there."

"I think we could have done better at autofocus. That’s the one thing I think. But we’re catching up."

"Olympus is also doing a good job with the OM-D lineup, and their lenses are very good. In terms of movies, the Sony Alpha a7S. And for focusing, the Sony a6000 is impressive. The wild-card of course is Samsung’s NX1. It’s very bold and the focus system is very interesting."