Operation is very easy. Unfortunately, the smell was not completely gone. If I then boarding every day, there was strong odor. I must be at least. Ventilate with on the middle level, then it all goes away in 4 minutes. The product Caramba 631,001 air conditioners disinfection has helped yet, because the smell earlier, despite airing did not go away. Therefore, 3 points - The performance at this price.