For me, the following points were decisive in the choice:
* Large tank
* Ultrasound
* Suitable for larger rooms (> 25m³)
* Continuously adjustable
Since this is my first humidifier, I have no comparison to other models, but in about 2 hours on the highest knob position the humidity of about 35 rises to ~ 55%. Unfortunately, I had initially operate the unit at the highest level about 12 hours (as long as the tank holds approximately) with the result that the windows were fogged (mildew hazard / humidity about 85%). Therefore, I recommend everyone to operate a humidifier only in combination with a hygrometer, which I'm doing now, so not from "too dry" to "wet" is because mold is an invisible health risk.
The unit is well made and makes a solid impression, I own it for about 2 months.
Since I'm wearing contact lenses, I have some problems with dry air, which are now gone.
The only thing I is acidic regurgitates that this unit needs a few times for some reason some time (~ 5 minutes) to produce the mist, but often it works directly. As I said, I think it's all great in everything and am glad to have acquired it.