Good game just bonus crates dont give you much, i have gained level of chapion which you are supposed to receive 50% of all crates but i have yet to recieve this as every time i open a crate i recieve items or 1 upgrade card. If you play the game without buying cash or coins from the game then you will be there for ever trying to upgrade all drivers and parts, and the other players you race against may be using the same drivers or drivers that arent to the same level and you will still be beat.