My children and I have been using the free BOC offered by SCM but I find that we aren't making entries regularly, mostly I think because we make it a bigger deal than it needs to be. We tend to be perfectionists.
Now, I've been looking at My Book of Centuries and I really like the layout. My question, for those who have used it, do you have the printed book or the e-book and what do you like about the version you have? And when you make the entries do you use pencil or pen?