For filling you have to almost the whole device disassemble ... until the small plastic frame ... then turn the wooden ring and finally a plastic cover then you can fill with water with the enclosed measuring cup and then perfume reassemble it and because of the wooden ring bit attention it is necessary to use both hands and pay attention that one gets the not holding too weird.
From described silently until soft cluck like in selling text is not to talk .... I hear a fairly obtrusive noise of the small fan what one could get used to when the device would not turn off every 5 minutes for 30 seconds and thus be reminded is how loud the unit actually is, of cluck I hear nothing, probably that's just noise too loud.
For illuminating: in daylight you can see none of a color change to recognize it must already be very shady or even better night.
Conclusion: Will the device in the bathroom or use in the kitchen because the noise does not bother me, for living and bedroom, I recommend the Revenna Soehnle there you really have a visible color play and a soft soothing rippling
