If you live in the Northeast like I do, then you know how expensive it can be to heat your home in the Winter. To combat this, we keep the heat on downstairs during the day, but turn it off at night when we're all asleep upstairs. But being up at all hours with a newborn (or two), throws a wrench in whatever your normal might be.
Dyson's Hot + Cool Tower Fan Heater ($300, originally $450) allowed me to keep the downstairs family room at a comfortable temperature for me and the babies without cranking the heat, or jacking up my bill.