It appears that the SootEater is generally recomended on the form. I have a friend who is interested in purchasing one. His first question was if it would have any issues making it to the top of a 35 foot chimney. He currently has trouble making it up that high with a regular brush. From conversations it sounds like his setup is a straight shot from the furnace in the basement through the roof with insulated stainless pipe. He is hoping to use a sooteater to be able to clean from the furnace side. Any feedback from those of you who have used one?