My central AC is not getting any younger and since there are fed and state incentives of around two grand to convert my existing system to a heat pump....

Is there any reason I should not? What all is involved in this switch? My current system is all electric so there is no gas to deal with on the heater, and the existing duct work is working great. So I don't need that.

While replacing the existing outside unit is do easy even I could do it the inside existing heat and AC unit is another story. So I might as well have the whole thing done by a professional.

Anyway.... Any advice or things to watch out for?