After I had the pleasure of having the "low profile" jack of AT inadequacy, I decided for this one. This bags per hour from just 5 mm, while the faded from ATU in half an hour is equal to 10 cm (Of course, the drain plug was turned off). Quite satisfied, I am indeed still not but me 5 millimeters per hour can live or work. Probably one can not expect more in this price range.