A.J.
Added: Supposedly around age 3, 4,or 5, they start to tranlsate in their heads instead of learning directly in the language, so if your child is young, like 2-ish, just use English book and subtitles for yourself so you know what is being sad, but correct, teach the child in the language you are trying to learn. But that's really hard to do when you don't speak it-it's almost impossible not to tell them the English meaning.
My kids never get bored with it. They have watched it thousands of times and still love to watch it. The catch is, they won't just pick up anything from it. You have to go through the book (book has English translation and you can set english subtitles) and teach it to them and practice etc. Otherwise, they will watch it endlessly having no idea what is being said. This is good for hearing pronunciation and stuff, but they won't just "learn" it. But it is great in that it includes most basic conversational sentences, counting, letters, etc in the stories. Plus a vocabulary DVD. We have levels 1 and 2 of French, and my kids know everything in those, but we need to supplement a lot of other books and stuff since they never hear French around them other than Muzzy. But yes it's good.