I have stayed at the Marriott Ko Olina next door and it is a fantastic area. The lagoons are well groomed and not crowded at all. The environment is extremely friendly and quite a welcome experience to the insanity that is Waikiki. The Dole Plantation (and Dole Whip) is not too far away and you have convenient access to the North Shore. The wife and I are EXTREMELY happy they decided to build in Ko Olina as it is the only area on Oahu we will ever consider staying at.