I bought this product when I had a PC. For PC use it's good enough. 24-bit is as good a quality as yo can expect for the price range and it does provide a good kick to the foundations of your house. The price is right, the quality is good, it gets pretty loud, even if you are just using it in 2.1. It isn't the best looking or most modern looking set of speakers but they're not drastically ugly either.
The sound card its self is simple, a mic volume control and a master volume control but I stay well clear of it because the software the you get with it is the far more impressive feature. You can control volumes of each speaker, do hardware checks, diagnose problems and really get it sounding good for the room you are in, the music or film you are listening to and the preference of your listening.
Only thing is, I switched to Mac after a few years and when I did that I had the choice of buying a whole new speaker system, putting up with 2.1 (which the Mac allows for the CREATIVE Sound Blaster) or spending £20 on a new sound card. Not too frustrating considering how long I have had them though.