I have had a lot of issues with my mini-splits. I am a firm believer in the technology, but my Pioneer units have had a lot of issues. I am glad some innovative companies are getting into this industry. I built a passive house that has triple-framed walls. We don't need much heating/cooling, so mini-splits seemed the obvious answer. Hopefully we get them squared away soon as we have been in the home for 1.5 years and have learned that in the Denver area (zone 5b) they don't perform well when it gets into freezing temperatures. I am interested in the technology you have described (the injection) to keep it heating during really cold days.