Batman Begins is worth a rent.
Batman has its traditional battle system - fighting enemies by repeatedly pressing the same two buttons until the enemy is dead. Batman Begins managed to improve on the system by adding several original mechanics to make the battling more interesting. Stealth is often used to creep up or passed an enemy. You can even alter the environment to strike your enemies with fear, allowing you to defeat them easily. The main problem with these mechanics is that you're told exactly when and where to break a pillar, box, etc. There is very little strategy involved in this process, making the game simple for the average gamer, and downright easy for the veteran players. Some of the stealth portions are fun, as well as figuring out a small obstacle, which can give great satisfaction after solving the puzzle.
Graphics:
The cutscenes are well done, as well as each character's facial expression, but when compared to some of the better looking games on the market, you would think that the developers could have put more effort into the visuals department.
Sound:
The voice-acting is superb, as well as the sound effects of nearby footsteps. The music is perfectly fit for the dark theme of the game, like all Batman games.
Value:
Unfortunately, the completion of Batman Begins's story is where the fun ends. There are hardly any unlockables, and no extra missions to complete after the final cutscene.
In the end, Batman Begins is worth a rent. You can finish it in 3 days and return it with the satisfaction of knowing you didn't spend $50 on a game that doesn't deserve a purchase.