Does anyone have one of these units? Do you like it, cost to operate etc.

We may be looking to get one of these units. Our house is out of town and we are going to be on propane so on the surface this electric unit seems to be cheaper to operate, no maintenance (except filters), no fumes, no CO2 sensors. Overall it seems like the best solution to rising fuel costs. And this thing stores the heat during off-peak times.

Thanks for any info.