I found it most effective to swing it hard in a 180 degree arc using the sharp straight edge, reverse the tool and swing it back again using the same sharp edge. It has so much momentum that it slices through the undergrowth and brush. In the past I have used a scythe, which is also very effective -- except with very large brambles and small shrubs; they needed loppers. With the Morris Dunsford Long-handled billhook you won't need to take loppers with you. It was amazing what this can deal with.
For anyone wanting to help keep our public footpaths free from encroaching undergrowth this tool is a great workout and highly effective.