Hi there! We are using Preparing with the extensions this year for my 10 year old 5th grader. I think the idea of a year of historical overview before the four year history cycle is brilliant. We are really enjoying seeing how it all ties together. I've never used MFW, so I'm not sure how to compare them. I can give you sort of a run down of our day and see if that helps.
I have a younger son who is doing the Beyond guide this year, so generally I spend a few minutes going over the LA, Science, and Independent history assignments in Preparing with the 10 year old, and then he does those on his own while I work in Beyond with his brother. I love the science assignments in Preparing. He reads the pages and then either narrates what he read, or answers a short list of questions (he does this in written form), or draws and copies something from the book for his notebook, and then once a week there is an experiment. They are teaching the kids to fill out lab reports this year along with the experiments.
After I am done with my youngest son in Beyond, I check over the 10 year old's Preparing work. Then we go over the Poetry section (there are suggestions for dramatic reading, oral presentation, illustration, etc) and the Bible assignment and do whatever the activity is on the history page that day--research, vocab, geography--it varies. Then we call his brother back in for the Storytime box and the History reading (my youngest son is following along in the Preparing history just because that's easier for mom!
), and do the History project. The projects are broken down into very managable bites. Then we do math and our own electives that I have added in for our family (art with his sister, piano, chess, French).
One thing I love about this curriculum is that it covers all the essentials, plus cool projects, and it does it all in amounts that we can actually get done. If you have any specific questions, feel free to ask.