The pack itself is not bad at all; and frankly its quite good, but...
It just breaks the progression of the game for me, the goals of unlocking new stuff is pretty much gone with regard to firearms, now that I can take anything that I want at 100% integrity, it takes a bit of the fun out of targeting certain game and instead becomes a romp in the woods/shooting gallery type experience which drained a lot of my interest. After I got this pack, leveling my dog (not from this dlc) was the only fun I got out of the game afterward.