Good entertainment for at least a while.
Graphics: The graphics in this game is absolutely amazing. From the shine of the guns to the lighting to the enemy detail and the engine used for the environment destruction and everything is above par. Everything is game is basically destructible and enemies even die in cool ways. Hell... you'll even want to miss sometimes because of the game's superb dust and fragmented pieces flying around when bullets connect. Real time blur when reloading is also used and is a nice touch to the game.
Sound: Everything in the game sounds great and just how you would expect it too. A cool thing about this game is when your health gets extremely low, the screen turns a black and white hue and all noise except for a buzzing sound and your own heartbeat is audible. A nice touch, in my opinion.
Value: Now being 20 dollars, it may be worth it to just go buy it and play it, but if you play it while renting you might not finish it because of its difficulty. Even though it is somewhat short, that prevents you from finishing it as quick as you thought you might.