I bought the first masks as soon as they started to be marketed almost two years ago and still use them. Since then I bought both the first generation nose wire version and now the Pro version.
I use only rarely other types (disposable. FFP2) and only when I am obliged to do it (p.ex. during a flight or entering a hospital where only disposable masks are accepted).
They are very good, rather confortable and with the Pro version there is no more fogging issue for me who wears glasses. I always use the headstrap version.
I liked from the beginning the idea that one can go out for a longer journey with only one mask. Previously I had in my suitcase one mask for every day.
The disposable masks were not the right answer considering their price.
I wash them occasionally, lightly with some liquid soap. They dry very fast so that they are ideal for travelling.
I also appreciated the fact that these masks were certified by respectable institutions (certificates available on Sonovia's site) and are made in Israel.
I ordered them directly on Sonovia's online shop and were always delivered very fast via DHL (last order; 2 weeks ago: ordered Friday, received Wednesday).
My wife uses them as well, very satisfied.
I would highly recommend these masks.