The first thing you notice is the Graphics, but thats not all you'll notice.
Gameplay: Along the lines of Super Mario 64, which redifined the word "Video Game" This had a HUMONGOUS overworld, it takes like 5 minutes to get to 1 place to the next. 10/10
Graphics: This will be the fist thing you'll notice once you turn on your game. Garunteed. This game brought graphics to a new level. The texture in this game is really good. 10/10
Sound: Not as good as I suspected. It could've been less repetitive, altought it has a few good moments like Gobi's Valley. 8/10
Value: If you have at lest a week off, you might want to get this game to fill up the time. It took me 2 weeks to beat entirely, even staying up till 2:00 a.m just to beat a level. you will notice how hard it gets once you get in later levels, it gets harder to get jiggies ( the equivelent of stars in SM64) and the final boss fight can get hard if you don't know what to do. 10/10
Overall: I would say, if you could rent it or buy it, it's worth digging a measly 5 bucks to buy this game. It actually should be worth more since you play a minimum of 40 hours playing it. 9/10