i bought a ritchie grass slitter a few years ago, and use it over all the grazing and cutting ground a least once or two times a year, , that and the opico grass harrows seem to keep the grass looking well. I could not tell you if the economics add up by the time you take your time and fuel into account, ( the grass slitter has about a ton of weight on it , two bulk bags with sand in). So the tines get right down. Do other people use a grass slitter often, i would like their opinion to the benifit or not?