I know various merits of motion flow settings have been discussed plenty of times, but having most of my custom settings now settled on my Sony XD80 55" (that Ive finally set up!), its the one thing I just can't seem to find a decent setting for. Ive got motion flow, and most other 'assist' settings off for 4k films/blu ray etc but leave it on for standard TV and App settings (Netflix/Prime etc) Ive found a standard setting or custom setting of Clearness =1, Smoothness 1-2 subtly smooths over "normal" movement, including most noticeably scrolling credits text, where with no Motionflow the juddering of the text was really annoying me! However, when any motion flow is on at all Ive found it utterly useless for anything sudden or fast moving - cars zooming past, people moving quickly and blurred infront of the lens etc. In these cases there seems to be very obvious 'blips' of artifacting appearing or strange flashes of distortion is the best way I can describe it. Its like the system can't cope and panics. Ive noticed these annoying little burns on bright flashes from explosions too. Does anyone know what this is? Is it a limitation of the TV, software or something else? As I say its either on or off - even on the lowest settings it happens noticeably which is a shame, as I said I like having the subtle setting on for a general 'sheen' and for the effect it has on slower moving items, but its so annoying, particularly in action films where it can't seem to cope with anything sudden. any insights??