I have a Bosch BBVA (with auxillary heat strips) that was installed a few months ago that replaced an air exchanger from 1971 and a roof compressor from the early 90s.

I absolutely LOVE the Bosch system. It somehow manages to keep the heat more consistent at the set temp than my previous system. The Bosch system supposedly has some sort of power saving feature. We shall see how it handles the California summer.

As the adage goes, install quality is more important than the unit itself but so far I'm really impressed with the Bosch unit.

Presumably not the new idea that is discussed in the article though?

We bought a heat pump last year and we're pretty happy with it. The cost is comparable to our older (not very efficient) gas furnace. Temperatures here (Vancouver, BC) rarely dip below zero Celsius.