Best answered by all the other threads on here that have already answered this question:
My thread with videos and a long written preview/review:
https://secure.gamesas.com/forums/viewtopic.php?f=41&t=31198
Sa1R3d Wa1ka's thread that should should address your other concerns re: lobbies being filled:
https://secure.gamesas.com/forums/viewtopic.php?f=41&t=31086
Long story short: Yes. The weapons is a beast, smokes are useful for Crash Site, and the levels for the most part are fantastic. The weapons can be used in any lobby, either DLC or regular and the other people in the game do not need to have the DLC for you to use those. Since the packs are new there are plenty of full lobbies as well. Only time will tell however whether they will continue to stay full, but if nothing else you get the beast gun and smoke out of the pack. Hopefully DLC integration in to playlists in the future will resolve this problem.