My brother and I both own one. I have used his and I have to say, I was impressed. I think the max diameter of the limb you are hacking is 4 or 5 inches. Buy we took off some 15 foot pine tree branches that were 3 or 4 inches with no problem. They are also really safe. You MUST have both hands on the lopper in order for the blades to start. If any downside, its that it is electric, but if you have a use for it, its worth it.