I think they are worth it. They add to the game a variety of map characteristics that were missing, e.g. verticality in Bailout, very-CQB-oriented Salvage, and the environment in Storm. And hey, you can't argue with getting to play maps from COD4 on MW2. Even though I don't agree with the 1200 MSP ($15) pricetag, I still would get them if I were you.