Well i was hesitant to pay $12.99 for an add-on, but now i am thankfull i payed that for it.
Well if you destroy all the billboards you get a toy car, if you drive through all the smahes you get a 2nd toy car, and all the races if you beat them you get a toy car.
The billboards, jumps, and smashes get quite tough to find them.
It gave me 4 hours and 44 minuets of game play so far and ive only completed 2 of the actual races.
Overall I will give the add-on a 8/10.
I only payed $19.99 for my actual game so I feel that $12.99 for an add-on was a little rediculous.