Moto GP 3 is a bit old now but it's a classic
The good: Awesome graphics, great sound, real tracks and the opposition are hard to pass but not to hard but a sort of challenging hard.
The bad: Unrealistic bike behaviour in simulation mode and it gets boring quickly.
Overall I think that if you like Motor sports then Moto GP 3 is right up your street but because it is old you should buy Moto GP 4 instead but if you would like something cheaper then Moto GP 3 is for you.