Simply put: perfection
Any fans of the this game should definitely install the Freespace 2_Open patch, which is freely available from a variety of sources. This open source patch adds souped up graphics that will make full use of your latest GeForce GTX 200 series graphics card, and includes several extremely well made user campaigns, some of which are fully voice acted. Online and LAN multiplayer is also fully supported, with many servers available for play.
Granted, this game is rather hard to find these days, but if you ever have a chance, get it, because only then can you experience gaming perfection.