If you have a choice between this game and the original then I would go for the original. The first game is more true to the films with the lego twists. This versions finds you jumping from play sets to play sets rather then a continuous story mode like in the other Lego games. Levels are short and repetitive. Not really an improvement just a different style of playing.
On a good note you do have bosses to defeat which can be a bit tricky and many mini games and challenges. The graphics are pretty nice to with plenty of characters to unlock/buy and lots more vehicals.
All in all this is more like playing with lego, building and trashing with an Indy twist rather then the original game play of playing through the movies with a Lego twist...not my cup of tea but was all right just to pick up and have a quick play - i would wait until price goes down