This thing is wonderful when we have colds. We have 3 of these, one for each room and use them often.

Has the option to use one or two Vapor pads. Needs to be near the bed for best use. Works better with less air circulation. Vapor potency lessens after about 6 hours even on its lowest setting.

The refills only last a few hours. And are pretty expensive considering.

It does exactly what I need it to do. It works great!
Vicks Advanced Soothing Vapors Waterless Vaporizer