I have played lego star wars, batman, indiana jones and harry potter and this one is my favourite. I am 26 and an average gamer, not serious; just enjoy playing on my DS and the end of the day.
This game provides enough of a challenge but is still quiet easy to complete. If you get stuck you can go to other levels and complete a different world then come back. These are lots of characters to unlock (unlike in Indiana Jones where you get 10 different Indiana's), my favourite is Darth Maul with his dual light saber. You get to play through all 6 episodes and unlock characters from all of them, either through completing the level or by purchasing them. You then get to use a whole host of characters in the free play option to find hidden rooms. The movie clips are great and have so much humour in them, especially if you have seen the original movies; it's a fantastic take on them.
The only down side to the game is the number of times/hours I played it - trying to get all the studs to unlock all of the characters/mini games. In the end I had to sell the game in order to play some others.
This is a great addition to any nintendo DS collections and I would thoroughly recommend it.