We have been using two Steffes ETS units for 16 years as the basic heat source for our place. They have been trouble-free and function very well as advertised. They are clean/efficient - direct radiation units plus fan triggered by a thermostat - no liquid or piping involved.
We also use a wood stove in our vista room when there, and a couple of wall mount/vented propane heaters in more distant areas of the house.
The ETS units are clocked to charge up at off-peak electric rate hours and, unless the surroundings are very cold, they continue to radiate some heat until re-charged each night.
However, it seems to take a while (couple of charges/days) for them to get rolling once we turn them on in late Fall. So, am wondering if they would be satisfactory for a cabin situation where you show up in cold weather and need heat right now. OTOH, if your electricity is cheap, you could leave it on the "low" setting when cold weather sets in - that would probably keep the place decently warm or, at least, not freezing - and turn up the setting when you arrive.
Hope this helps.
