I am looking for a lightweight alternative to my big DSLR gear and I was wondering if anyone here has experience with the new Olympus OM-D E-M5 Mark II camera with M.Zuiko 300mm f4.0 PRO F/4 IS lens?

I think image quality will be fine overall based on what I can see, but my concern is about auto-focus capabilities and birds in flight.

Any comments based on first hand experience?

Thanks!