What issues does everyone have with the auto cycle cleaning feature. I seems to me that it would cause problems with smoke, ignitors, and reliabilty. I am going to buy a stove this spring hopefully for a discount, and I am looking at a Mt Vernon or a Harmon p68. What are everones thoughts I like how quiet the Mt Vernon is, but the auto clean feature is a real hangup for me. The heat output from the P68 is awsome.