It only took one night for me to fall for Mighty Mite. Fed Ex delivered yesterday afternoon, and last night the temperature in my bedroom never dropped below 66°. Since before Christmas, I have regularly suffered through bedroom temps that sank into the mid-to-low 50s --- with an oil-filled radiator running all night on its highest setting. I should explain that I moved into this unheated Southern California cottage last summer, not realizing the misery its leaky doors and windows would cause --- or that we would have headline-grabbing cold! Ill be weatherized by next winter but comfortable until then thanks to this little dude. My only negative is that it is does make some noise --- less than a fan, but not silent, either. Pros Pumps out a lot of warmth, miniature size, housing stays cool. Cons Not silent.