The only thing I don't like about the one I have is that it doesn't have a head band to keep it on mouth so my hands are free, I had to make a custom elastic band for that.
My unit broke and was giving a blue flashing light and that led me here where I found no solution, I am a DIY guy by nature, I decided to open and see what's wrong, circuit is encased in a plastic box with gasket to isolate it from water, I was guilty of washing it before I got this blue flashing light, I dried the circuit very well while being extra careful not to break any of the thin wires and tested it, all good, then put it back together and I was enjoying the mist again!
This machine works nice and I don't get it with the bad reviews, just handle yours with care and it will be fine, mine in over 1 year old now.