Not gonna lie, I have barely touched the title yet. However the main reason of writing this review was to try and clear up some of the confusion surrounding the title before people rush out, buying it and then flooding the review section with negative reviews because they didn't ensure it works on their console.
It will ONLY work on the 3DS, 3DS XL and the newly released 2DS consoles. Not your DS, DSi, DS Lite or DS XL. The older consoles have more or less been phased out now so it made sense for them to upgrade it. The same goes for Miracle Mask and the upcoming Professor Layton vs Phoenix Wright title early next year. The 3DS console is much more powerful than the DS allowing much more content in the game and for you, more complex puzzles and features to the title.
The title itself is similar to other Layton games in that a strong, heart tugging (this is essentially the last proper title in the series) narrative is entwined in a series of tricky, fun puzzles. This time the game has over 500 puzzles (around 150 in-game and the remainder are daily puzzles for you to test your mettle against every day.) fans of Layton's previous adventures will feel right at home.