The domestic one is used by IT / Paramount I think. As for the international - I believe I used it on an LH flight and its certainly much nicer than the alternatives (le meridien - even after the renovation to look like a resto bar instead of a seedy 80s "multicuisine bar and restaurant", and certainly far above the other two contract lounges). I also saw TG, EK, CX banners outside the BICA.