Is it worth buying...
For the offline portion I haven't touched it, but I've heard it's spectacular.
The online portion is though as usual filled with asses, hackers, and still very low populated (right now.)
Not really worth the $40 as I don't believe in just offline gaming (Halo 3 is an exception if it didn't have online.)
Horrible lag online, stupid ranking techniques, and the list goes on and on.

They are ,however, working on a project called Comabt Ops which is believed to be downloadable.