I bought this machine to dig a trench to install invisible fencing for my dog.  I had no idea how easy it would make the process.  The trencher has three settings, and I used the 1.5 inch depth setting for the wire.  It was a bit difficult to set the depth, but once I figured it out, it was a piece of cake.  The machine cuts a fast and even trench, and cuts through small roots and vegetation.  Wear safety glasses, long sleeves and shoes, as it does throw up quite a bit of debris! Great product!