Man these things are great. I went through 2 tons of barefoots previously and was cleaning the stove about every 3 days due to ash levels. The North Countrys are great in that my glass as been extremely clean since running 5 bags through and there is minimal ash coating the stove. They are very small pellets (broken up quite a bit) but my enviro ef-4 has no problem pushing them through. And to boot, the house has been the warmest it has seen since the beginning of the winter using these pellets. With the Barefoots, I was having troubles getting the first floor over 70°, but this morning I came downstairs and the temperature was 74°. I actually had to turn the stove down a bit. Overall, very impressed.