After a few hours on Sunday, and last evening, I have all the towers built, and have 4 walk way packs to build. It was a pretty easy build and I would definatley buy more of them. Some people only build individual level of the buildings to allow flexibility, but I want purpose built towers, so I varied them up and in the end got about 12 towers and a ton of walkways.
I broke out my necromunda gangs, and voila! Instant necromenuda game. Obviously they need to be painted, but these really could be spray and play, then add some detail as needed.