My parents used a vaporizer all the time when I was younger, so when my son got congested, we bought this Vicks Warm Mist Vaporizer to help him breathe. We also have a cool mist humidifier. The doctor said that usually those are best to use, but in some cases, the warm mist works best, so we have and use both. I like to use the warm one particularly when its colder outside, as it keeps his room warmer during the night. I also like the features of this one where you can add Vicks liquid to the water or put some in the little tray on top.
However, the biggest problem we've had with this...