Their promotional video claims that the sound quality of it is greatly reduced. Hmmmm… weird way of marketing your wares, right? Especially if sound is all you have to offer! But anyway, if you DO favor ‘other’ sounds for your Airbus A-300 and you care how a CF6-50 sounds, then you may want to have a look, no, sorry, you may want to listen to their add-on package. For Euro 10.90 you can replace the default sounds by some of theirs. Available at simMarket for both FSX and FS9.