The value in this game is not in the single player experience, butis actually in the multiplayer.
The graphics are good. There is fantastic lighting and (provided you have sufficient ram) all the special effects and massive armies move smoothly. However, this game isn't really a graphical masterpiece, but nothing bad can truly be said about the games graphics nonetheless.
The Gameplay is ausome...This whole game is based off the starcraft experience, but is brought in a bigger and better way. The introduction of heroes and the downloadable patches contain even more new material. A built-in map editor and downloadable model editor allows for complete reworkings of the game resulting in various 3rd parties developing modifications and maps with great multiplayer. The value is truly in the multiplayer. Despite a few server splits and other random unfortunate events the custom games built by the third parties of battle.net are extremely popular and entertaining. The most popular of which DOTA (Defense Of The Ancients) has become a focal point for warcraft's development of slang and even clans.
This game does support surround sound and the bass provides a great deal of realism. Blizzard has created multiple unique sounds for each and every unit. Including various units you do not have an opportunity to control during single player games.
At the point that I am writing this the game is almost two years old so the value is great. Buy this game, boot it up, and start playing online ASAP!