Calmness & efficiency
I love using this Dolphin Clinic Vaporiser, and am confused by some of the negative reviews. I've found that the aroma spreads through my living area well, and the area includes living room as well as kitchen/dining room. The oil drops seem to last about 1.5 - 2 hours, which wouldn't see you through a whole night, but as I just use it in the evenings it works well for me. It's a gentler heat than using tea light candles too.