I have had a stihl fs 70 for about 3 years now and its been used in heavy commercial use for all 3 years. I have never had a problem with it. Its run flawlessly. The only complaint I have about it is it doesnt have as much power as I would like it to but thats understandable as it is there entry level commercial grade trimmer. All of my handhelds are stihl, trimmer, blower, chiansaw, and i have never had any problems with them. I would buy a stihl but I dont have any experience with other brands.