If you can look past it's flaw's you might just enjoy it.
Of course with most game's it does have some minor flaw's like sometime's your buildings stop having electricity for no reason and then it will come back on, i had this problem on sim city 4 for the pc but luckily there was a patch for that, nothing can fix the bugs on the ds version but don't let that put you off. This game is great if you just give it a chance, it is also quite addictive once you get into it.
A lot of people complain that the graphics suck but if you have played any of the really old sim city games then this probably wont bother you to much. The music is very sim city-ish, nothing really special.
You can choose the difficulty level by choosing how much money you start off with, i have only played on easy as i havent had this game long and easy seems good enough for me although i will obviously try hard at a later date.
Im very happy that they decided to make a sim city game for the DS and i would love them to make more games like this, i dont think there are enough game's like this on the DS.
Anyway if you like sim city games and dont mind not so great graphics then give this a go because u might just like it.