Product review (4 stars): Happy with the product!
I use this to clean the vent for the pellet stove.  Our vent pipe is pretty short (15') so, it's an easy job for this product. The brush fits nicely in pipe and does a great job.

We've had it for a couple of years but since I only clean the pipe in spring time, we've only used it a couple of times. So, haven't tested it too hard and haven't had any issues with the brush losing bristles or dying.

I like how the product is a complete package, meaning, it has a couple of attachments, and it's well thought out.

My only negative thought is that the the rods have a rather soft and rough surface and pick up dirt and dust easily. I have to clean them afterwards with turpentine or the like but some dirt and marks remain on the shafts.  But, it's just a minor whine. I'd buy this again!