It's gotten very cold here in the northeast (and pretty much everywhere in the country, I think) and my Acadia continues to run well. It is amazing to feel so much heat coming out of the vents when the outside temperature is 10F and the subpanel meter indicates that only 2100 watts are being consumed. So far we've used $43 worth of electricity in this heating season. Actually it's less - I changed electricity generators, and need to adjust my spreadsheet's cost-per-kW.
Once we get further into the heating season, I'll post my latest energy consumption data.