We have used Alternative HVAC twice now, once about 2-years ago and again this winter. Both times we inquired about adding heat pumps to our all electric house, and both times they were great to work with.
We knew we wanted efficiency as our house is rather large and not super well insulated, and our research suggested that Mitsubishi was the best on the market. Alternative HVAC was the recommended Mitsubishi installer in our region and they responded quickly to our initial inquiries.
Mike is an expert on heat pumps and knows them inside and out. He came out each time and explained what sizes he would use, and where he would recommend installing the five different interior mini-split systems, where he would place the exterior units, the upsides and downsides of heat pumps and different mini-splits etc. When I called they always answered the phones or called me back, and met all of their deadlines, which I'm sure can be tough during covid and with high demand in winter (I was expecting slower service and would have been OK with slightly slower response time, so I was pleasantly surprised).
Within 2-weeks of our first call, our freezing cold house was blasting heat and using very little energy to do so.
Alternative had a GREAT team: they sent paper invoices and estimates via mail to our house (and email of course), they 100% handled all of the Peninsula Clean Energy rebates which had no issues, they appropriately sized all the equipment, they assisted with the San Mateo county permitting process, and stuck to both their pricing and service agreements with zero issues.
They also did an extremely tidy job on the installation. I am a picky person. I wanted the ducting to look super straight, clean, and with no mistakes. They were flexible with my strange requests (hiding stuff up in the closets for example), and made everything work better than I could've expected. They also had a follow-up appointment within a year due to some tiny issue which they fixed the next day, without blinking, even though our house is about 40-minutes from their office.
I probably won't need any more HVAC additions to my house, but I would certainly recommend this company to anyone who demands a professional experience and wants the best.