I had a friend ask me why I bought one of these....sez it's a waste of money, and I make too much of a big deal over maintaining stove temps. My thoughts are....1- I don't put all that much faith in my magnetic thermometer (candor....which is actually pretty acurate), 2- I like to know that my stove is cruisin' at 400-450*F, and keeping the house warm, rather than running it higher, open a window if it gets too hot in the house, and burn more wood than I need. What are your reasons....if you own one ??.....or am I really getting anal about monitoring the temps