I'm so glad I found this site and thankful for all the info on it! I just got rid of my old Timberline wood insert that was just slipped in my brick fireplace that had no liner at all. Certified chimney sweep came this morning and said chimney is in good shape and after a thorough cleaning will be installing a homesaver ultra pro ss liner. After reviewing many an insert and seeing all the positive things people have had to say about the Napoleon 1402, I think this will be my choice. However, I just had a couple questions I was hoping owners of this insert could answer. First, how difficult (and what all is involved) when it comes to cleaning the liner and getting the creosote to fallout in the firebox?. Next, are there internal parts that need to be replaced and if so how often do they typically need replaced and how expensive are they? Thanks in advance, crawfish