Hi Jim, I have been using mine for about 2 years now. Its a big kamado Joe, and I typically run between 230-270 for low and slow depending on what i'm cooking. I think the longest i have cooked at those temps was about 11 hours. I'm sure I could hold a lower temp if I tried. One thing I have learned is to bring it up to temp slowly, if you overshoot your temp they are a pain to bring the temp down. Hope that helps