I've never felt such a range of joy an anger in a game, it is hilarious but frustrating, however it's not annoyingly difficult. It's hard to explain but I do think this game is the best XBLA game on the marketplace at the moment.
It has online multiplayer where you and three friends can compete in speedway and trials maps, to see who can get the most points over the set amount of track (maximum of seven) or there is also an awesome looking local multiplayer where four people can play speedway tracks against each other on the same Xbox with much fun to be had, a great example in the link below.
However, the jewel in the crown of this game may be however the insane map editor allowing custom created maps to be shared. There has already been some insane maps being made in the first month of the games release, imagine how awesome these tracks will be in a few months time!!! We already have loving recreations of Valve's Portal and James Cameron's T2.
So guys, if you haven't got this game you are missing out on some seriously fun gameplay, and if you do have the game comment below, let me know what you think of it and please follow, much more reviews and rambling to come.