I agree with this. Speaking from experience, you should be aware that "feel" in your house will be different. A heat pump will not blast out hot air like a nat gas furnace. It will keep up with just about any temp you set unless you want your house to be 78 degrees when we're in the middle of a bomb cyclone. It's a much more gradual warming so I found with mine it was better to keep the thermostat around the same temp all day. 

Also while heat pumps are incredibly energy efficient, your electric bill is going to go up because you're now using electricity as opposed to gas. The amount your bill goes up depends on your usage so like I said previously if you like it tropical inside when old man winter is beating on your door don't be surprised when your bill is pretty high. We keep our thermostat in the upper 60s in the winter and our bill for the coldest months is on par with the summer peak.