I've got a broken head somewhere, I'll take some pics one day soon.
The broken drive shaft seemed totally random, the broken heads were all bad luck/bad technique and the bar getting twisted or hit as a branch fell.
I don't doubt others may have better results, but the head on every other pole saw is a lot more sturdy and doesn't turn a small
into a $300aud bill.
I just think there are better built options for the $.
Could you get years of trouble free service? Sure. That doesn't make it anywhere near best in class, or best value for money.
It is the worst piece of equipment I've owned. In a small business with a few employees doing a mix of tree work, agricultural and environmental contracting that is a fair achievement.