Really, more of an "interactive episode" than a "game"...
The only playing you do is clicking on various objects to collect as evidence. In court, you can "Press" characters about certain statements. Or you can choose to "Present" evidence to the court to prove a witness wrong or to just shed new light on the case.
There are a few extras- some clips from the game and show. You unlock them in the game by choosing certain options but if you missed them the first play-through I honestly can't say they're worth playing the game a second time for. So this game has little to no replay value.
The game would really be better if all the "game" was taken out of it because it's most boring when you stop watching and start playing- it really woud.
So rent it or borrow it, no need to buy. Ciao.