One of the best games I've played in my life. Perfect story, great visuals, great animations and bad camera angles.
The music totally raises the tension in the game, and it fits the environment and actions superbly. The adrenaline levels rise with the correctly selected soundtrack.
The story is one of the best thought stories in a game. It sucks you into the game in such a way that you don't want to let go of the controller until you finish the game. The characters, the backgrounds, the personalities are totally magnificent.
Moreover, it is possible to play the game more than once, because there are multiple endings and multiple choices in the game, all resulting in different consequences. So, it can be seen as a big web of choices, leading to a couple of endings in different ways.
Finally, the downsides. The only downside of the game is the somewhat irritating camera angles. I am not saying the whole game suffers from this, but sometimes and in some scenes, the angles get annoying.
In conclusion, the game is totally worth buying. I had been a fan of "Quantic Dream" since I had played Fahrenheit (a.k.a. Indigo Prophecy), which was a game similar to Heavy Rain in controls and concept. I want to thank them for creating this wonderful movie-gaming experience. I hope they will continue with this "interactive story-telling" concept.