Haven't played the DLC yet, but I do intend to eventually.
Again i'd just like to say this was an amazing experience i'll never forget. One of my fondest gaming memories and I have quite a few since i've been gaming since the NES. Didn't know what to truly expect going in, but I left with an experience that is truly legendary.
If you havent done so you should gove Demons Souls a spin if you have a PS3. It should be really cheap. Unfortunately I am pretty sure it's servers are down nowadays though.
I remember telling my friends that it was the dumbest game(Demons Souls) ever made and stupidly hard(inexperienced at those games back then). Then after perservering I remember telling them it was probably my favorite game in recent memory.