We have a Poulan Pro that we bought as a combo pack. It had the pole saw and weed eater attachments bundled together. It works fine. It is heavy. As others have mentioned, with any pole saw, it is easy to pinch a blade. I use the three cut method for trimming all branches with my pole saw and chain saw, too, for that matter.
Here's a picture that explains it. Not only does it eliminate most pinches, it keeps the branches from pulling down bark and skinning up the tree. Check it out. Try it a few times. It works great.
In a nut shell, you cut through 1/3 of the branch from the underside of the branch about a foot out from the trunk. Then you cut outwards of the first cut about 2" all the way through. It snaps the branch at the first cut and there is no bark or strip of wood that pulls down the underside of the branch. That's usually what hangs a branch. Finally, you make a final cut near the trunk, but not into the collar. That 1 foot piece drops right off. Leaving the collar in tack lets the tree heal much faster and cleaner.