I saw these in a magazine add or something a few years ago and had considered them. I'm not quite sure how much more effective they would be than just straight pea gravel. I find our muddy paddock gets so deep in mud that I don't think this type of grate system would be much benefit. Not sure how it would perform in the winter either with the shifting of the ground. Our weather here is so weird that it freezes and thaws at least a dozen times over the winter.