I am only running 2 mowers this year but the blades are needing sharpening at least once a week. I just dont think Im getting as good of a cut with my self sharpened blades I do on a bench grinder. Taking them to a local dealer will end up costing me $6/blade plus lost time driving across town. I dont think I need the best sharpener but I'd like to get something that will last and do a better job than my bench grinder. What would you guys recommend?