With its cramped presentation the first glance of the game is pretty... useless! But once you get the idea of the puzzles and you're into exploring the 'huge' map by defeating the opponents it's... ADDICTIVE!
Finished the game in a few days and loved it. After completing the main story line (red quests) there is still plenty to do. I'll still be busy with this game now and then in the future I guess. 