i gave this unit four stars and i'll keep them, but i made a mistake.  i said this unit was quiet.  i'm in my bedroom, the unit is all the way is at the other end of my first floor.  on 750, this thing is loud, loud, loud.  the heat is okay, but not great.  it's spring and 50 degrees outside. i thought i'd use low the temps to give the unit a try out. guess i have to get use to the noise.