I've been playing Nancy Drew games for years, and have been glad for them, as they are excellent games for young teens to play, especially girls. Nancy Drew is a good role model. She is smart, and a good friend.
As with any series that has been around this long, the games run the gamut from the great to the not so great, and several in between. The last game, The Haunting of Castle Malloy, was a very good game with lots of challenging puzzles. The Ransom of the Seven Ships appears to be an interesting game, as it is set on a beautiful tropical island that is isolated and difficult to reach.