Classic monopoly, in the most classic way possible. For the most part it's fine, but other versions of the game definitely do it better. The game still works, but there are very few house rules to choose from, and some of the standard ones are missing (like having to complete the board once before you can buy properties). The AI's are also extremely generic, and are quite straightforward, even set on 'hard' mode. They'll always trade properties for a certain price, without variation, among other things. The visuals aren't bad (It's a board game, it doesn't have to be mind-blowing) and the audio is generic Monopoly music. It also has a guide you can turn on if you don't know how to play.
Verdict: Other consoles have much better versions, but if you only have a DS or really need a portable monopoly for some reason, it's not terrible.
