I would say the other reviews are pretty spot on. Works well. I had two years of buildup in the chimney. It takes a little strength to hold it in the center as you move it up and down. I have a smaller ryobi drill that had no issues. I would say before you use this product. Open it up 24 hours before use and set it down on a flat surface to spread the bristles. They are zip tied for shipping and will work on a smaller chimney fine out of the box. For a bigger chimney let them spread out for a day or so. I guess the best compliment I can give is. I would buy this again. Cleaned my fireplace from my warm living room. I attached a before and after picture as well as a pile of my results. For the money I saved myself a 150 dollar service call. Not to mention I’ll be able to use it as many more times as it’ll hold up.