HORRIBLE!!   That is the only way I can describe this product.   The sad thing is...it does what it's suppose to do....cut the edge off of cold room (SF Bay Area) ....but the smell.   It smells like the engine room of a battle ship.  I have taken it out...and it STILL smells!!!  My God...what type of toxins is this thing giving off.  It's so bad...I am throwing it way rather than giving it someone.  It's That Bad!!!