This is by far the best rally game you can buy on the PS2.
This game is hard to master though, so you may want to use a steering wheel, but with practice, a joypad should be good enough. It will take time to master controling the car and winning races and they are TOUGH and the game is unforgiving. You have learn to slide, brake at the right times and you're lucky, you'll figure how to do the 'scandinavian flick'.
There is a lot of variety of gamemodes, cars, environments, so wrc will keep you busy for a while.
Graphics are the best seen in any racing sim, the draw distance is excellent, cars are well detailed.
The sound and co-driver are excellent, but the problem is that when you make mistakes, you co-driver will scold on you!!
When you do the main WRC championship, there are 16 countries with 6 long stages in each and they are long! Some stages look very similar but with the different countries, you get a feel of the various terrain.
Obviously this game is a great alternative to Colin McRae Rally but of course, the game is officially endorsed by the FIA/WRC.
If there is one racing/rally game on the PS2 to get, WRC 4 is the one.