I've got a small well insulated shop that I've heated for many winters using a portable 1500 watt electric heater. Each heater lasted 2 or 3 years and cost somewhere in the $15-$30 range. This year my old one died so I went shopping.
The first one wouldn't allow a temperature below 65F and I like to keep the shop at 40F or so at night. My mistake for not opening the box before I bought it.
I returned it and bought another. It ran up to the setpoint and then never came on again unless unplugged and restarted. Not viable.
Back to the store. This time I splurged on a $45 oscillating one with a shutoff timer and a "no-freeze" setting. Supposedly it would run to 5F over the setpoint, shut off, and come back on at the setpoint. I set it at 60F to check it. It ran to 65F, shut off, came back on at 55F and shut off at 62F. No telling what it would have done the 3rd time - I ran out of test time and patience. What a mess.
I'll call the manufacturer in the morning and see if I got a defective one. In the meantime, does anyone have a particular model that they've used and found reliable?