I agree with Rachel’s post above. GWG isn’t busy work, but a spiral approach and continual review, teaching at a higher level each year. Lessons are short, so that is definitely in keeping with CM. Others might find the workbook approach and the use of “workbook sentences” to be off-putting when compared to other programs, particularly CM programs, but my boys really needed the practice when it came to grammar so I don’t regret our grammar approach whatsoever. In the end we used both GWG and R&S… I thought I would HATE R&S, but actually liked it better than GWG because the R&S teacher textbook is set up so that teacher can do a LOT orally. GWG was great, but kept me a little TOO hands-off. In short, GWG is strong, but for us R&S was even better.
Agree also with Rachel on holding off on grammar until age 10…