Product review (5 stars): This thing is wonderful
Anyone can use this. (unless you have an aversion to reading instructions! ) Evident from reading the  few  low ratings that the instructions were discarded. Took me a half hour for a complete the clean out of the vent, most of that time spent getting the drill (with clutch) & shoveling a path through the snow to the vent. (Wintertime). I would, and have, recommended this to others. So far they are waiting for more favorable weather to do theirs.