Negatives:
Spontaneous appear advertising block and it is not too tight.
Just the File * Death looked at the tracks *. Takes about 26 minutes every 5 minutes a short commercial. (At least not louder than the documentary!)
When some documentaries (and there are really good and many at SPON!) Wants to look you have to take that into account, unfortunately. But I prefer the documentaries from ARD or ZDF media libraries.