I purchased a Febreze NOTICEable for the holidays and plugged it in as soon as I got home. My living room is a large open space w/ 2 story ceilings and this worked so well. I was worried that even on the highest setting I would just barely able to smell the scents. But I love it. And the fact that it alternates between 2 scents every 12 or 24 hours (can't tell?) you don't get used to it and "forget" the scent. I will be buying refills.