I think it has a lot to do with what firemanpat2910 stated. If it gets bound and you have to work it out there it goes. I changed the bar on it last year because it was a bit bent and it has gone better. We have about 100 miles of trails and only get to cover a small amount of that each year so when we are working it's a rush to cover as much trail as possible.
One other item to note would be that we have a bunch of different people using the equipment. We have three Husqavarna Saws. Two with chain adjustment on the chain cover and one that is built into the saw. Just about every year I have to change one of the chain covers because someone didn't pay attention when putting the cover on with the adjuster build in. We will not buy another setup like this.
So if you are the main user, and need a polesaw with a lot of reach, and not in a high production enviroment I wouldn't shy away from buying this saw. It has been a good dependable saw for us.