Summary: This game is very good. It's main mode provides a series of very challenging puzzles, plus a good story and it's bonus mode gives the player an Role playing game(RPG) experience. Professor Layton and the Last Specter has a large variety of puzzles. A "must-have" for players who like puzzle games(Game contains puzzle involving math, brain teasers, etc.).
Summary: The Last Specter is a good game (it's Layton afterall) but if you're familiar with the series then you will notice a slight drop in quality. The puzzles are still very fun and challenging, so there are no complaints there, but for everything considered the game just feels very short and anticlimactic. The real disappointment with this game, without spoiling anything, is the game's story.