Regarding the Stihl 066 professional model chain saw. I have used this model chain saw professionally since they first put out the model 14 years ago. It is a powerful well balanced saw for all around cutting. I use it for falling and bucking trees, and also for getting in the winters firewood supply. Ive also been fortunate enough to have had the saw in the back of my truck or in my trunk to cut trees out of the road during heavy windstorms.It has excellent safty features including a chain break that is activated during kickbacks. It also features a hand guard. Its meant for cutting bigger trees, and will handle a bar up to 42 inches if need be. Many people prefer a 32 inch bar on this model, but I prefer a 36 inch bar, as its easier on my back during limbing. This saw is very dependable and easy to start. You will rarely have it in the service shop.