We have only just begun this program but I have been eyeing it for a couple years. Finally took the plunge and am so glad I did. Kids (and I) are far more interested and engaged, the prep for me is little to nil, understanding and natural deduction flow and math is fun- all of which add up to a curriculum that actually gets done! I avoided MUS in the past because of the DVDs, as I prefer teaching to be live and personal, but the videos have not been a hindrance at all; we watch together, pause and talk more or practice if necessary, and move to the hands-on application and problems on paper. Videos are thorough but brief. So far I can't say anything negative about this program.