Hi,
We follow the WTM fairly closely. We use many of the recommendations and we definitivly follow the cycles (history and science) as well as the stages.
I found the book about 4 years ago. It was this book that guided me along, gave me a starting point as well as an end goal to keep in mind.
Overall, I would say that is very easy to follow. I don't do much more than research resources, buy them and use them. When I use them I simply do the next thing most of the time. On Sundays I make myself a shopping list of items I meet need to get for specific projects or experiments. That's it!
The only thing I find challenging is Science. However, I do not think this is a WTM problem. I think there really are not many good Science resources available for younger kids. Both my kids are still in the Grammar Stage.
Susie