One of the most addictive games there is to play.
Its also really fun to decorate your house and try to get lots of points at the Happy Room Academy. You can decorate it with endless furniture that you can buy at Tom Nooks (the Raccoon/Tanuki's furniture store) or get from animals!
One downside is that bad things can happen if you don't play in less then 3 days. The game runs on real time so if you come back the next day things have changed from the day before. Trees will grow, flowers will wilt, and there will be different furniture in Tom Nook's shop. Its pretty annoying to come back a week later and find that your rare, black roses have wilted.
Or your favorite character has moved.
You can change days in the "menu" so you don't have to wait, but even if you go back a week the animal that moved, or turnip that died, or flower that wilted still wont be there.
Also, this game isn't for everyone. Some people may get bored of it and wish something more exciting would happen.
But a couple of the small downsides doesn't make the game any less fun for the people that don't get bored of it. Its easily fun enough to play daily and this has got to be one of the most, if not THE most addicting game i've ever played. Although it doesn't seem like it, this game isn't only for little kids and theres a lot to do.
Overall id definitely recommend it for anyone that owns a DS. I'd say its the best in the series and as ive said. VERY addicting.