We have them--Belle has been learning German for over a year now. Her tutor uses them to supplement, and also gives her homework from the workbook. I feel they're best for younger kids. We opted not to get additional Muzzy stuff because we felt Belle was moving beyond what they could provide. Buzz likes watching them, too, but doesn't have the language passion that Belle does. The computer CD has all the languages on it, not just the one you picked, so Belle has been using it to teach herself Italian at the moment, and she'll start Spanish in a couple months because she wants to speak it when we hit Cozumel on the cruise. What can I say? I should mention that I don't speak German, or Italian, or Spanish!