Summary: If you are a father/mother intending to give a nice game to your children, this game can be a good choice. It has cute characters (LEGO appeal is a hard thing to refuse for kids), a friendly gameplay and many known songs. For hardcore Rock Band players, it may worth only for a few songs that can be exported to Rock Band 2 (but only with a huge price drop that has already come to disks sold on eBay), as the game has no interesting features.
Summary: Before you buy this game ask if the download code has been used or not. If the code has been used... you can still play the game with the disc but you will not be able to transfer the songs. Here is a problem I had though. I wanted this game to be able to export the songs to Rockband. The thing that is not well marked on the label or in the papers of the game is this.
Excerpt: At the right price this is a good way to get some more use from the Rock Band or Guitar Hero hardware. Some cool tracks on here that go alright when you've got a couple of mates around having a bash on the drums etc.