I'm very glad to see the seldom seen Golshifteh Farahani in this film. IMO, she's the prettiest actress on the current scene as well as being very good at her job. Anyway, this is a little better than the typical shoot-em-up action film.
The way this one follows on the first film in the franchise isn't really clear to me because I didn't see the first one. At this point, fans will tell me to shut up, so I probably should. The action in Extraction 2 is for the most part unbelievable, but it's well done.
The Georgian brothers are not fully fleshed out, so their backstory takes a little flashing back to establish what we are to expect from them. Put your critical thinking on cruise control and just take the ride. It's worth the price of admission.
Update: I've seen "Extraction", the first film in the franchise, and it was also very good and well cast. Chris Hemsworth is a good action film actor, and the main draw for me, Golshifteh Farahani, is the one who drew me to watch these films. I enjoy looking at her and watching her act, but I can't take the chick flicks that she does outside of this franchise. I can't watch just anything to get a glimpse of her, so at least I'm not a fanatic. ;-)