We live on a private gravel road and the brush tends to encroach every couple years. Hacking it away by hand was getting a little old so I bought this to use on the PAS power head I already have. It cuts really well, for small branches as you would expect. Don't expect to do much over a quarter inch diameter.
The cutting surfaces seem really, really high quality. They are very sharp and should be very durable.
I should note that this cutting head and power unit are not really light. My old arms were getting tired of swinging it around after a few hundred feet of road (about 20 minutes of use). That should not be a surprise and it won't stop me from using it, though in measured doses.