As someone who was against the CQC DLC for being too COD-ish when DICE should have been focusing on delivering true Battlefield sized maps (which are still lacking), it's actually really fun.
The new guns are great, and I'm really enjoying Gun Master (Gun Game). The maps are real fun too, the size and flow of the DLC feels a lot like Killzone to me. I usually still play Rush/CQ on B2K maps, but the DLC is worth the money for the person who just plays to have some fun, IMO. Now, I just hope DICE can focus on Armor Kill and End Game and give us truly Battlefield sized maps, but I am surprisingly happy with CQC being a good diverse alternative. In fact, Gun Master is much better than Gun Game from MW3, IMO.