Sometimes open-endedness is a double-edged sword.
Basically what you're getting here is some fun, diverting online and LAN multiplayer for $19.99 (for the expansion pack alone, not the full package including Black Hawk Down). The lack of controllable vehicles is a downside, but you also get dozens of maps that can be tons o' fun with enough people. The longer sight lines make for more challenging gameplay, and the large servers allow a dynamic that makes every round a different experience. The single player game, however...it needs work.
A distinct lack of actual Black Hawk Down license material, and some installation hurdles.
Great view distance, nice water effects and lighting, but the characters are looking blocky and the textures are often blurry.
The sound of warfare is quite good, especially in multiplayer, but there's almost no environmental sounds.
If it wasn't for multiplayer, I couldn't really tell you what the draw would be, to be frank.
Lasting Appeal (7.5/10)
Multiplayer, while good, is complicated by strengthening the sniper's position. Singleplayer is fundementally problematic and will take only a few days to complete.