I haven't had a problem with this unit yet. Nothing to complain about. It features accurate temperature sensing, reacts quickly to temperature changes, and has precise enough settings to suit just about any task. The only issue I have with it is its 1000 watt limit. I had to buy another heater fan because most are over 1000 watts on any setting. But I'm pretty sure this unit is for smaller applications, and there were no surprises about the limit, so I'm extremely happy.