We installed a Carrier Infinity series heat pump about 4 years ago. It works seamlessly with our natural gas heat, and the air conditioning in summer is super efficient and very comfortable. The heat pump makes very little noise. The electricity cost is very low because we have solar.

Our Carrier GreenSpeed central air and heat pump system heats and cools the main living space in our house. We now use oil for hot water and to supplement the heat pump in cold weather. The high performance air filtering system reduces dust and pollen. The system is efficient, quiet and comfortable.

The air handler is located in the attic, with short ducting runs to the bedrooms and the main living space. By insulating the attic roof (not the attic floor), the air handler is protected from temperature extremes, thus improving the overall comfort and efficiency.

We don't use temperature setbacks much. We find that whatever energy savings occur with a lower temperature overnight is exceeded by having the system run at full tilt to restore the higher room temperature in the morning. It is better to keep a steady temperature.

Two of our air conditioning zones went out this summer.  We decided to replace them with heat pumps. We couldn't be happier. In addition to the energy savings, they are much quieter than the air conditioning systems we had before, and the temperature control is much more precise. Also, while the installation cost was slightly higher than a conventional system,  because they use less electricity, and the relevant rebates, the increased cost will pay for itself in just a few years. 

If you do go this route, we would strongly suggest you look at a system like Bosch or Daikan that uses an inverter technology. As I understand it these systems, vary the level of the heating and cooling depending on the situation, rather than just being "on or off" like more traditional systems. These account for greater energy savings, more precise temperature control, and quieter operation.   

My oil heated home has four heating zones. A few years ago, Muirfield Mechanics installed an Air Source Heat Pump in the central living space which is the most used zone. To my delight, the system heats the central living space and travels up the stairs to partially warm that space as well-an added bonus.
Soon, I will consult the Abode coaches who have been hired to consult on heat pumps by our light plant. It may take me a few years, but I'd like to know what the best and most affordable strategy is for moving forward on using heat pumps throughout my home. My family and I will feel better knowing that our heating and cooling is all electric, running on renewable energy, and not contributing fossil fuels to the climate emergency.