I have a perfectly good and working heat pump system that I gave $5K for about 20 years ago. I serviced it, cleaned the fins and coils this morning. It still looks like new and has a simple compressor, coil, fan, and control board. Because of MY age, I was looking to replace it. The new one is now $15K and has a variable speed compressor, fan, and pump, along with an inverter and two way complicated thermostat. Several of my friends and neighbors have complained about the high cost, short life, multiple problems, and lack of qualified or willing service technicians to keep these systems working. I just want a simple long lasting system like the one I have now and those don't seem to even be available anymore. Has anyone else had one of these systems for 10 years or more and been happy with it, or unhappy?