Is it really that good, or am I missing something? When I was low level around SL25 the only weapon up to par I found was the red dragon tail sword, though it didn't level up with me and ended up being totally useless. The only other weapon I've found -currently I've just killed Ornstein and Smough- that was interesting was a crystal halberd, but the durability thing is terrible.
The BKS might be a bit slow, but the amount of damage it deals is so beyond anything, that I wonder if I'm missing anything, or if I should go all the way down taking some normal weapon and upgrading it to +15 or something like that.