alanti: I would be interested in hearing other players views on the pros and cons.
The notebook does not carry over to the Best Of Courses as they are treated as separate courses, Neither does the notebook have a generic section for notes that would apply all the time (e.g, yardage charts). It is limited to a section for fway and green per hole, and you may only look whilst actually at that course. Some multiplay issues exist controlling when you can edit as well.
Nothing you could not do better with a bit more thought if that interested. Being lazy I v sometimes enter a note in it and v sometimes that's useful.