Other replies have great points. A few of my own (1) Proper install is really important, we're building a software tool to make sizing heat pumps and qualifying

Other replies have great points. A few of my own (1) Proper install is really important, we're building a software tool to make sizing heat pumps and qualifying ducts easier (2) Having a dedicated smart thermostat means that back up heat strip operation is much better than the normal control logic (3) A well installed heat pump system provides a better thermal environment than a furnace because it precisely matches the load of your home instead of cycling on and off. This lets the surfaces in your home soak to a more uniform radiant temp, and radiative exchange is ~50% of your perceived thermal environment at room temperatures.