Laurie, I bought both of them and took them to the Via. In the first couple of towns I mailed the CIcerone guide back to Madrid. Weight issues was part of it, but the way it is written is not for me. It will tell you in detail advice like, "cross the road, go 200 meters, then take the first fork and go right, then go 200 meters more then take the left fork staying to the left of the fence, ignoring the signs....". Like that! Too much detail on the instructions when really the arrows and other signs used are enough. It´s well marked for the most part. We got lost only a couple of times, and we found our way back no problem. I tend to ask anyone when I can for directions. The CSJ guide I liked better, for it is lighter weight and it is basic towns, distances, heights and accomodations.
Now, do know that it is not up to date. For example, there is an albergue in Aldea del Cano, very nice. In Monesterio the refugio is closed. In Merida, there IS an albergue also very nice by the river in a park. The Hostal Miraltajo was reopened. I would make notes into the book as I went through the forums and added any info people ahead of me would offer.
When are you going?
Lillian