There are some interesting new combat situations and some new toys to play with, but there could have been more content.
There are several (eight) new maps, and everyone can find a liking to atleast two of them. The new maps would probably be the highlight of this expansion; there isn't that much new content other than that, so don't purchase this pack anxiously anticipating the new weapons, vehicles, and factions. What is nice about these new maps is that they are very distinct, unique, and diverse. One of my favorites would be Warlord, a karkand-type map between the British SAS and the mid-east insurgents. There is a palace at one end of the map that the British must caputre, which provides for some incredibly fun close-quarters combat and intense situation as you and your teamates storm the palace gates, using grappling hooks to scale the walls. Another fun, or atleast ineresting, map would be Iron gator, a map that takes place enitrely on an aircraft carrier. I suppose the developers made note of how fun it was to board and storm carriers in the original battlefield. All in all the maps are decent, though I don't particularly care for the night time maps (I'm sure some would love it).
As for the content, well... there are some fun new toys to play with, but nothing amazing really; there could have been more. I would say the biggest turn-off for me was that 4 out of the 6 new factions are almost completely indentical in the weapons and vehicles they use. The comparison is as follows:
Russian Spetsnaz: I was extremely dissapointed to find that their weaponry is identical to not only the rebels, with whom most of their maps are staged against, but are also almost completeley identical to the original MEC. The only new additions would be the hind helictoper, which is one of my favorite new additions, and a BMP-3, which is also a nice addition. However, the rebels, the mid-east insurgents, and the MEC-SF all have these vehicles and weapons with only slight variations, none worth mentioning. I believe the Spetsnaz should have atleast gotten the AN-94 abakan to mix the equipment up a bit.
Rebels: They are equipped with the exact same weaponry as the above faction. There is really no reason to play as one group or the other. I personally don't understand how they have the latest AK series guns. They should have atleast been equipped with older AK-47s as the standard arm.
Mid-east insurgents: Once again, look at the above two factions, and that's exactly what they have.
MEC-SF: Ok, these guys are different in that they use standard AK-47s instead of the new series AK-101s, which I really don't understand since they are supposed to be 'special forces,' as opposed to rebels and the insurgents.
British SAS: They are probably the most distinctly fresh group. Their small arms arsenal is completely new, though their vehicles are still American. I wish the developers would have atleast had the patience to model a Challenger 2 tank. Nonetheless, the new weapons are excellent additions and are fun to play with. The British are staged against the mid-east insurgents and the Russian spetsnaz (go figure). I always want to play for the SAS because the other two factions with whom they fight are completely identical rehashes.
Navy Seals: Two new small-arms, an apache helicopter, and that's it.
Having said all that, there are some new vehicles that are available to all of the factions, such as an ATV (fun to ride), an interesting new buggy with three machine gun attachements, a jet ski, and a pickup truck with a mounted .50 cal in the back.
Out of all the new vehicles, my favorites would be the hind (available to the spetsnaz, insurgents, MEC-SF, and rebels) and apache helicopters (obvious who that's available to). They are both very fun to pilot and are now much more deadly weapons against infantry; the rockets do more splash damage. However, I really wish they would have given the hind transport spaces like it has in reality.
So, like I said, buy this for the new combat situations, not the new weapons.