This is clearly a very well made game, the graphics, sound and handling of the vehicles are spot on and the difficulty of the career is also bang on, although some of the assists seem completely pointless (auto steer/corner braking/throttle management,) they do make the game accessible to new-comers. Turn these assists off though and put the difficulty up to 6 an you've got a very tricky game indeed - mess up just slightly on one corner and you can fall from 1st to 8th in an instant, which brings me on to the tracks.
In Dirt 1 the tracks were mostly very challenging with narrow roads, huge crests and branches of trees sticking out into the road, just getting to the finish in one piece was quite a challenge and usually ensured a win. In Dirt 3 however, the tracks are really very wide indeed and much much smoother than those in Dirt 1. Because of this the whole feel of the game is different, instead of just trying to get to the finish in one piece your trying to get the right line through every corner and hit every apex, this makes the game feel a bit like PGR, but off road. This I suspect is deliberate by Codemasters to make the game easy to "pick up and play" but it does detract from the essence of rally somewhat. Unfortunately the tracks are also far too short and there aren't nearly enough of them. Some rallys last just over 1min and while Codemasters will tell you there are about 32 stages in the game, theres pretty well 4 rally stages - yes they've reversed them all and put little bits on the end but once you've done one race in each of the 4 areas (Norway, Kenya, Finland and Michigan) you've pretty well done them all.
The track issues however are not enough to stop this game being worth buying, online is fun with new infection, capture the flag and cat & mouse game modes, not to mention the excellent Gymkhana. The career is challenging enough to keep you going for quite some time and can last over 10 hours. You can also upload a video to YouTube, although for some reason you're limited to 30 seconds which makes it a pretty annoying feature.
All in all though this is a beautifully made game, the snow and night races provide something different from any other Dirt game and new arcade modes add a whole new style of driving. Multiplayer overall is a blast if you have a few mates with the game - especially with the team based modes so basically it's worth buying and can be classed as one of the better driving games on the 360.