The game is great. The story, while I liked it, surprised me though. Considering this is a Mother game, compared form what the last two were, it took me by surprise.
To me it was difficult in several parts, but that was easily solved by leveling a little. And once I had PK Ground, good-bye difficulty.
Still, it was fun to play it, and still had what the other two games contained, despite it's... moments. (Chapter 1 comes into mind)