This is a great location for families with young kids. We went with both grandparents, 3.5 year old and 9 month old. We spent most of our days in Ko Olina and really didn't need to go too far out. There is a Costco along with grocery stores fairly close, so you can easily prepare all your meals at the villa, but also lots of good eats nearby so you could go out for all your meals.
I have no complaints about the place we stayed, in fact we are hoping to go back in the future.