I just picked up this Bad Larry a week ago and wanted to share my experience. I'm not sure if anyone has been using one, but it's been a huge help. Obviously not good for hot coals or ash IN the stove, but I use it to keep the hearth and ash lip clean which has made dust in the room essentially non-existent. Much different than when using a dustpan/brush. Comes with HEPA filter, uses any DeWalt 18V battery. I just keep it by the hearth and do a quick 15 second vac job in between loads. Loving it. One charge lasts about almost a week, and I'm using the lower grade DeWalt batteries. It's $80 without the battery at Lowe's or on Amazon.