I've actually been waiting for this game since I got a DS which was way back in August last year. Peach is my favorite Mario character so I couldn't wait for her own game but it's worth it. Infact this game was one of the reasons I bought a DS. The basic storyline is that Bowser and his friends traps Mario and Luigi as well as Toad. And thus you (Princess Peach) have to go through different levels to save them.
Gameplay- Now this is one of the easiest games I ever played so far but I'm not one of those people who criticize games for their difficulty unless a game is annoyingly hard. You can also use these things called vibes that represent 4 different moods and you can build up your meter to use them by "eating" an enemy or collecting blue crystals. In all levels (except boss levels) you can save 3 Toads but it's only optional. I must find a purpose for this. Overall the gameplay is kind of similar to the old Mario games.
Graphics- The graphics are great despite the "kiddier picture" while playing. Peach's face on the bottom screen is stunning and that's what brings the score up for graphics.
Sound- Wow Peach sure has a nice voice. The sound FXs are what you would pretty much expect from any Mario game. Some of the music is great like in the Volcano and Beach stages in particular.
Value- Well you have all the Toads to save And then you unlock some new levels after you beat Bowser. You can also purchase new moves and sound tracks from Toad's shop
Peach's own game!
Classic Mario gameplay with new technology.
You have lots of Toads to save.
You can purchase things.
A couple bosses (such as Kamek) was annoying.
You can't use Daisy
Overall: Like I said before don't let the cover and everything fool you. This game is not just for girls. So if you're a guy and you're a Mario fan or Peach fan don't be shy and go out and buy this game.