The version I made for Burning Man came out awesome. I didn't kill the keg there, so I have some back at home now and it is a thick dark coffee monstrosity.
It was aged on 4 oz nibs, 3 vanilla beans and 1/2 oz bourbon soaked oak chips for 3 months with 2 oz of sumatra beans dry hopped for 3 weeks at the end. The flavors blend together very well and it probably still how some room to grow if I don't tear into it. It went from 1.110-1.030 after massively missing the target and I added the bourbon oak chips to make it more like KBS. If I could get bottles of KBS, I would like to compare it to it.
I prefer dry hopping the beans and I don't think it hurts if they sit for a few weeks. The last batch i made while adding it to the boil was really astringent. This one has none of that. It is smooth.