It's a really neat, compact set. And I guess what makes it so are the minifigs: Loki, Iron Man, and, to an extent, Hawkeye. Shame it didn't come with the doctor and Maria Hill.
Loki is awesome, of course. Iron Man even more so, I would argue, but both look fantastic! They both are so iconic and the details in the figures are amazing. Hawkeye? Alright, he's pretty cool too, especially with his sunglasses and compound bow. And I like the details on his back, with the quiver of high-tech arrows.
The truck? Well, I did not check it out too much. The figures take the show. But the truck is very well built and is not messing around (what would you expect from SHIELD?).
If there was one thing I would change, it would be giving Loki a glowy-blue bit for the staffhead, and him and Stark hair, and not making me watch that part of the movie thinking "when is Iron Man going to show up?".
Should you get it? Well, do you want the figs or not? The car is pretty cool but is overshadowed by the figs. I know I'll be getting the Quinjet at BrickFair, so that also has Iron Man and Loki, but not Hawkeye (plus the Quinjet is awesome), but because I'll have two of those figs, one of each can be scrapped for pieces! I do not have much need for a Jeep...
Now, to get my hands on the Captain America set (and a Hulk fig...).