I find the dvd's great, its one thing reading about something but to have it shown I think is much better also the amount of info to keep in ones head, well it falls out of the back of mine, would not part with my collection. Robster says he/she is having problems running them, try this----CLICK START----CLICK COMPUTER----RIGHT CLICK ON DISC----CLICK EXPLORE----RIGHT CLICK START PC----RUN AS ADMINISTRATOR----ALLOW. works for me, keep me posted