When I became a first time chicken mom, I purchased the standing Coop Worx feeder and waterer based off the reviews and durability of the products. I absolutely love them.
After I succumbed to the spell of that thing called chicken math, the standing feeder/waterer were sufficient. However, to provide multiple feed/water options for the larger flock, I knew exactly where to go. My run is 12x20 and I have the space for another set of standing but when the wall mounted feeders became available, I decided to try them out as they do not take up any floor space! The quality of these products is superb and most definitely will be the only feeders I use for my girls.
Note on the photo, I think I mounted them a bit too low as the girls had an increased amount of feed under the wall mounted ones and never had feed on the ground with the standing feeder. Since this initial photo I have raised the wall mount and have had no issues.