I hesitated between this broadcaster and others in different brands. After studying / compare broadcasters (on the generated noise, oil consumption, distribution, system quality giffard) I still was not decided. I went into a pharmacy and I fell on the diffuser. So I started and I bought it.
Dissemination level: I have a 75m² apartment essential oils strongly feel all the parts. I wonder if we do not feel them in the hallway of the building :-)
Oil consumption level: it's really correct, it does not consume much. 30 drops of oils to use 4:30 to maximum speed and in my opinion will smell remained until tomorrow.
Level generated noise: 45 db max speed and slow speed 36/37 dB measured at 20 cm of the diffuser. For comparison when I actuates the switch to change gear I have 65 db. Without any noise in the apartment I'm 30 db.