I pre-ordered this game, and I am not at all dissapointed by it! It's great! Quick overview:
After the intro movie, you choose a girl to go on the island vacation with. Once you meet Lisa, she takes you on a tour of the island and after a bit of exploring she takes you to your first volleyball match. After that you head back to the hotel where you can store items or swimsuits you collect/buy, visit the casino (slots, blackjack, poker, roulette, etc), or you can go to bed for the next day.
The days are divided in three segments, morning, daytime, evening, and you can spend your days doing what you want. Sitting by the pool, lounging around the beaches or jungles, or play a fun mini-game in the pool for extra cash (in addition to the cash earned in the Volleyball games). You can visit the islands several stores and browse for neat accessories or trinkets, even more swimsuits or clothing.
The volleyball is a bit dumbed down, but is still alot of fun once you get into it and learn the controls. The AI difficulty of the other girls changes as you play, the more you beat them the more they learn and the harder it gets, but if you lose alot, they ease back a little.
A large portion of the game is geared towards collecting items, clothing and accessories, but it doubles as a nice way of convincing other girls to like you and join your team for volleyball matches. If they like you enough, they just might give you a gift or two, which might even be one of their own personal items, like clothing that only they can buy at the shops, as the clothing shop features different suits for each girl selectively.
This game has gotten alot of flak so far, but all in all its a fun game if you get over your biases and just sit back and play it. It kinda leaves something to be desired though, like more exploration of the island, or more mini-games/things to do, but its not a bad start!
The Japanese versions were packaged with calendars and limited edition playing cards featuring the girls of doa on the backs, which are also featured in the game at the casino!
And no, there isnt much nudity, only a quick bit during the opening intro movie.
That's all, enjoy!