It's only worth shelling out on if the product is worth it and that usually depends on the equipment operating the flight. I went from Doha to Muscat with QR in business on their magnificently comfortable A320. Not lie-flat but proper big old style C seating and silver service. By comparison my friend went business with AF to Beirut and ended up on one of their A320's which meant Y seating but behind a curtain with a free glass of orange juice. On the way back he went on a 777 and hey presto silver service again. Check what you're flying on. Most European airlines narrowbody business ain't really business at all!