Bought this product for my kitchen that is constantly cold due to one of our regular heating units being broken.  My kitchen is about 500 square feet and even a little drafty.  This heater brought my heat from the high 50s to low 70s in a matter of hours.  It is highly portable and makes no noise at all.  I would definitely recommend this product.  I want another myself.  Very affordable solution if you need to supplement an existing heater with deficiencies.