In the beginning main point was just to save expensive building room, when building outside feeding system. People were afraid of, how to clean the bunk, because there is kind of universal advise that there must be feed refusal, otherwise cows are hungry and are not using all their potential. This fear was noted not to become reality. Even in the first outside feeding barn farmer said that there really is not a need to clean the nice and smooth stainless steel bunk at all, just taking out all the stones and wooden parts now and then. This kind of note You get from farmers who have this system. Of course it means that You must not put already spoiled feed into the bunk. Normally these farms feed once a day. Production results are surely at least in the same level compared to other farms with tmr-feeding.
Robotic milking layout
In robotic milking systems, when having more than 1 robot unit, tendence is to have robot room (with 2 or 4 robots) in the middle of barn and feeding tables in both sides. Normally this is done with two 4-5 meters wide feed alleys, instead they could do it with outside feeding system and save 6-8 metres building width.