First full month with the Optirmizer 250. Although the last few days have been WARM the week before was chilly with wind chill below zero. I cant believe how much wood i have saved with this thing so far. I did have a blower issue(stopped working) and the company had a local dealer meet me at my house with a replacement that night. Customer service "check". The house is always what the thermostat is set too and wood consumption is half if not a little more than last year,i bet not even 3/4 cord for this year yet. Quite a difference compared to the old Tarm. Cant wait to see what the thing can do when it gets cold out.