The OMD has very poor continuos AF like most mirrorless cameras. I can understand his frustration as that was why I jumped ship form the OMD, for static or moderate movement its great but anything moving that you have to focus on, such as children, I missed more shots than I hit. I really liked the size and weight of the OMD and the IS is fantastic, particularly for video, but with D600 I get a much higher % of keepers than the OMD.