It's still utilizing a hay net, but this was our slow feeder solution. The barrels are bolted into trees and then we just fill each one with hay once a day. We have 6 of them set up for 6 horses so that everyone can have their own if they don't feel like sharing.
We would have like to put them down a little lower, but we have a certain 16H mare that already tries to get the tops off...don't want to make it easier on her and then find her with her head shoved down in the barrel. Kind of defeats the purpose.