Wow! For such a small machine, this little guy really is a work horse. Well built and looks nice. Down side is it is kind of loud, and there is a 3 inch black knob on the back that doesn't allow me to push the whole thing back and out of the way when I am not using it. Small considerations when I take into account that it is clearing the air of particulates that would be inhaled and frees me from the hated mask that fogs up the glasses.