I have used the Volara since July 2022. My Medicare Advantage plan covered most of it.
It has alternating cycles of pressure which expands the airways and pulses which are kind of like an internal vest, all the while nebulizing (saline in my case). The nebulizer is weaker than my Ombra. So I use the Aerobika attached to the Ombra for morning airway clearance and the Volara in the afternoon. I was able to trial the Volara at NJH and my local pulmonologist before deciding to get it.