Animal Crossing: City Folk is the 3ed in the line of Animal Crossing games...

User Rating: 8.5 | Machi e Ikouyo: Doubutsu no Mori WII
Animal Crossing: City Folk is "worth the wait", "all it's cracked up to be", "instant classic" and "just plain fun". I bought the game a few days ago, and now found myself addicted! Now, I know there are already a few AC games out, but AC: CF has it's own personality of the series. You can go to the city (free, no bells needed), join the HRA, get your own Mii mask, and even sneak a peak in the Resetii Surveillance Center!
This game is a blast, but when I tried to use the DS suitcase, I just gave up because it wasn't really working. I suggest using the Animal Crossing moving van if you already have Animal Crossing: Wild World, but you don't get to transfer your bells, or things in your pockets. All you transfer is your character's look, and part of your catalog.
If you want a good time, play City Folk. But if you want to buy it, I suggest renting it instead.