The loggers I've known pick saws that are light, best antivibration, fast, reliability and good service support in their area. My dad ran mac until they weren't available then switched to Stihl, Husky's or Sach. A lot of his saws he had ported and recertified. But his brand choice was the saw manufacture that had the best innovation. Anything that helped get the timber on the ground because he got paid by scale. Any help that conserved energy and time is where he put his money. Pride and brand loyalty shouldn't get in the way of making a living. It's hard to say which brand was more reliable he was hard on his saws. replaced them every two years, the last saw was the backup saw. Mac 125super Pro was the most reliable saw he ran, he ran that saw 4 years then gave it to logger as a landing saw and I think he ran it two more years. My dad told me he thinks 125 super pro helped put Mac out business... dam good saw. But a sharp properly tensioned chain and letting the saw cool down a bit after a long cut will improve reliability.