It's well worth the money
Regardless, "Raven Strike" is well worth the $10 you'll invest in it. The first missions is a stealthy swamp-romp with a challenging, explosive ending; the second a tactical infiltration, with a longer, also-explosive ending; the third is a series of four segmented assassinations, each with its own feel (one a snipe, one a breach, etc.).
The dynamics here are pitch-perfect, and the level designers were really on their game. Low and high points alike shine with the type of tactical challenge that makes you say things like "Target three is rounding the corner, take out four on my signal," when you're playing in co-op.
There aren't many games that make me want to dust off my headset and actually engage with other players, but Ghost Recon: Future Soldier is one of them, and "Raven Strike" fits in perfectly.