A middle buster is also sometimes called a potato plow because it's a great tool for digging your potatoes, which was my primary use for mine. It can also be used to make trenches and I've done that, too, to make a trench to drain an area where water stood. The other use I had for mine was just to break up the ground prior to tilling. It would go a bit deeper than the tiller, you run faster with it than the tiller, so breaking up the ground first let the tiller do a better job quicker. And of course, a middle buster is cheap; a tiller is not.