@debminuet - That seems to be the big question recently. When my Innospire Go dies, I tried 3 different less expensive mesh nebulizers - all lasted less than 3 months using saline/levalbuterol before they clogged, leaked or died. It turns out that if you looks closely on line, almost all are similar or identical, and cheaply made.
I threw them away and vowed to stop wasting time and money until a reputable company came out with one.

Every month or so I go on a search to see what is available, with the amount of travel I do, I am willing to pay for a quality unit. BUT...everyone I think "might be the one" gets rejected when I use the User Manual - described as "self-cleaning" with using distilled water, with no provision for sterilizing. Many manuals say "do not boil, steam or microwave components" (for example, the TruNeb is just what I would like)

So as of today, I stick with my small compressor model DeVilbiss Traveler - it's a workhorse.