Its addicting as hell and fun. you just keep going through courses with other people trying to set the best times. Im usually in the top 10. just get it and joing the server with the most players. my names 50inchDLP on there.
short video to let you check it out. ill be playing right now!
http://www.youtube.com/user/Thereal50inchDLP -contains my Dreamcast project of putting HD vids of each US game up.http://bf3stats.com/stats_360/louerina