Hi, @beejenigma - Yes, I've been using an eFlow (eRapid) for a couple of years. I like it and travel with it. It's not perfect but I find it's quicker and quieter than the compressor type machines. I've written a bunch about it here in various threads. What specifically would like to know?

Here is one of those threads. https://connect.mayoclinic.org/discussion/survey-nebulizers-and-compressor-systems-speed-etc/?pg=2#comment-1187025

Given the vital importance of hypertonic saline in our regimen it bothers me that the "industry" pays so little attention to producing a reasonably priced small quiet user-friendly compressor/nebulizer. I'm thinking of things like the Philips Innospire GO mesh nebulizer.