I tried this product for free in exchange for my honest opinion. The Honeywell Top Fill Ultrasonic Humidifier Cool Mist Humidifier is by far the best bang for it's buck. The tank removes for easy filling, and a separate  little compartment pops out for essential oil.  

My family's house is heated primarily by a gas fireplace, which causes extremely dry conditions. My son recently developed a throat infection,  so I moved the Humidifier (which we run every night) to his bedroom and added eucalyptus essential oil to the built-in compartment. It was almost instant relief, helping him sleep through the night!

I recommend this product to anyone if they want to enhance and add a level of comfort to the air quality in their home. My family has learned it is essential for us!