It's a little bigger than I anticipated, but it's done just what I wanted.  After plugging it in, I hit the "auto" button and let it do its thing.  The air is clean in that room and smells are pulled right out.  There is a light on the front that indicates if the air is clean by turning blue.... This light is rediculuosly bright and we've had to put a dimmer sticker on it.  Otherwise it would light the whole room at night.