Right, I just finished this game earlier today and feel as if I got stupider over the time period between the third Layton game and this one, the puzzles were cracking me into mental breakdowns half the time, I felt like I was in a war with the wording of more puzzles than usual and that the difficulty level was all over the place (i'm looking at you Rocket sliding puzzle with the big orange ball, this was an early game puzzle?!).
The plot took forever to get going and when it finally did it was still weaker than the previous outings. The music was great though and Emmy was an enjoyable new character.
It's still a solid outing but I think i'm suffering Layton fatigue from the rapid fire sequels since not much changes with each game.
I'm thinking that my order for the games goes 3>1>2=4.