Put simply, you wont be disappointed by this game. It's a great setting and an excellent narrative with varied endings driven by the player, after finishing the story first time around I started a new game right away which is an indication of a truly oustanding game in my opinion.
The gameplay is solid and has enough variation to keep the player engaged and interested and the creeping sand that has swallowed up Dubai is like a separate major character in the story, it gives it a truly unique feel.
At this price (or any price) I would recommend SpecOps: The Line, even if 3rd person or military themed shooters are not your cup of tea, the storytelling is superb.
Buy it, play it, love it, get the sequel (hope there is one)