I am guessing those feeders require a flat surface? My coop and run is on a slop and just the dirt floor so that would be tricky.
Also, my birds like to shovel their food out of the feeder to eat later off the ground, so I have assumed such a feeder wouldn’t help me much.
My run floor is also somewhat uneven and dirt. I attached a board to the run wall, then got a big piece of plywood. I put rocks and dirt under the plywood until it was level, then mounted the mounting bracket on the board. I do regularly check myself that the treadle opens smoothly.
I also have chickens who sometimes sweep some food out of the feeder, but it's not too much. The height of the lip of the feeder keeps them from getting too much out of there. When I use the whole grain feed, they're barely able to get any out. They have an easier time pushing out the crumbles.
I had a lot of concerns about whether the treadle feeders would help. And because they do represent a chunk of money (I had to buy 4 to accommodate my crew), I waited to pull the trigger on buying them. Looking back, I could have saved myself months of frustration and work and money just buying the darn things.