I have used many different kinds of large weedeaters doing pre-commercial thinning, understory removal, and hardwood release, cutting trees up to 6" DBH. For nearly all brushcutting, the Stihl 90 held up fine. I doubt anyone that has one will give t up at a good deal though. As for the blades, I used every type possible. Some require a lot of sharpening. The Beaver Blade with a chainsaw chain worked great until it came apart and was found embedded an inch deep in a tree 20 feet away. I finally found a high speed carbide tipped 9" blade that will cut hardwoods, pines, brush, kudzu, briars, grass, etc. It is NOT good for fencerows (too many chances to hit a rock or fence post). The only place I can find it is at Tuskaloosa Lawn Equipment in Northport (205.339.3681). I used it on everything from the FS 90 to a FS 550 and will never use any other weedeater or blades. Handlebars make the work comfortable, unless you have to reach overhead a lot.