Not good. There are so many enemies you cant avoid. If there was a way to get rid of them i think it would be better. As it stand now it wont let me have fun by going max speed.
If you want tolv up ad te boins fast, go to the map square and play as rambo. Then upgrade your barrals as much as you can and use them as your primary, you arent effected by explosions so your safe to run into baddies with them.