I don't own one but I seem to borrow one regularly and I once had a summer job in high school running a brush cutter & chainsaw. It's really a wonder I still have all my limbs.
Just wanted to echo that you need to realllly learn how to sharpen the blade well. You will need to do it surprisingly often and most people who think they know how to do it, end up ruining blades and, as others have said, making it even more dangerous than if it were sharp.
It's not difficult but there truly is a knack to it. If you are going to use it regularly, you will need to learn how to do it yourself.
