This game is absolutely fantastic, do yourself a favor and buy this game.
The graphics are not substandard, not at all really they are magnificent to look at. They are almost perfect actually. The deal is that they did an awesome job on the environments and could have done a little better on the character models.
The sounds are pretty good and the music is fantastic. It is where the sountrack fits with the environment extremely well, dialog is a bit choppy but really who cares, you dont play a game to watch people talk anyway do you.
The short side of the game lies in the fact that it didnt take long to finish it, but hey great games don't have to take a long time to beat, look at the Metroid Prime series and well as the Halo series. They dont really take a long time to beat either in single player.+