After I Media function of my new Sony was more than disappointed with the Multi, I am with the FANTEC player has shared in December 2012 to close this gap. So far I have not found a format that causes problems when playing. MKV, MP2, MP4, ISO formats both Blue Ray and DVD no problem. Perfect reproduction of JPG files also no problem. No stuttering plays up where he left off. Connects network drives without problems. This unit does not go wrong. If not satisfied he can be that, either send back. I have to keep the player but.