I've used the thermal cube for about 3 years with good results. I use it with a heated floor mat hung vertically in my wet bay.
Heated Floor Mat LinkI'm not sure that I would use a thermal cube with high wattage heaters.
I place one thermostatically controlled fan-forced ceramic heater in the bathroom on a 12x12 ceramic tile, and another in the kitchen on the open over door. They are both set to come on at about 35-40 degrees. I also have the propane furnace set to come on at 35 degrees in case of a power outage.
