I personally like the Sims series so much, that I bought GBA and PS2 version (for one at home and in the car). The PS2 version is great, the graphics are good. You can now actually leave the house on the PS2, and the gameplay and music are still there.
I liked the fact that as soon as you have started the game, you can do the open-ended sims portion. The PS2 has a bad slowdown that can freeze for at the most, five seconds.
I recommend the game to anyone willing to make a house, get a social life, get married, and go to the bathroom at the same time! Buy it now