I have a Mitsubishi two zone for our main house and then a Fujitsu smaller unit for my office, both are doing just fine. The Fujitsu is a bit noisy. Both structures are insulated with spray foam and spent a fair amount of time air sealing. We also installed a ERV for fresh air. Overall things are warm.

We have a small portrait fireplace in the living room that makes it comfortable in the evenings.

We don’t change the thermostat up or down. We keep it at a constant 68F.

The only thing with the setup is that during Uber cold temps, it’s helpful to keep the bedroom doors cracked at night to allow heat in. It’s not a biggie to us.