Let's see..
- The story spans from ever since you were a kid until you have children.
- You get to choose one of the three possible bride candidate (one childhood friend, and two aristocrat sisters, one of the sister is a new addition for the NDS remake).
- The first installment in the series to feature monster training, iirc.
I'm not the one to say it's worth it or not. It depends from people to people. As for me, it was a decent game.