Beeeeaaaaaautiful place! lots of space and everything you need. There were extra towels, blankets, pack n play, high chair, cooler, beach toys, and soaps! Extra things for the 8 people we had, i been to some places where they provide 1 roll of paper towel and that is crazy if you hosting 8 people! i was pleasantly surprised by all the extras they provided for us. Full kitchen, pots/pans, dishes, lots of glassware, rice cooker, utensils...everything! they have everything you need to enjoy your stay. We most certainly did.
The property is beautiful, the pool area got bbq areas (first come first serve), Jacuzzis, and also a shallow sandy pool area (nice for kids). There is a bar as well, though we brought our own drinks to the pool (just remember NO GLASS of any kind in the pool area). There is also a lap swimming pool specifically dedicated for lap swimming, but it was under renovation when we stayed. There is a Koi pond/garden area which i have to say is really nicely landscaped. Lots of nice big Koi fishes, we took our 1 yr old to see the fish and i think she enjoyed seeing it. if you don't like swimming pools then the lagoon is a 5 min walk over.
The only downside with Koolina is that it is kind of far away from the main big shopping centers and popular Waikiki scene. Koolina has restaurants, small market, beach, and pools which is, by itself a really nice retreat to relax. If you're looking to spend most of your time at Ala Moana or Waikiki then i'm not really sure it is worth driving, traffic can sometimes be really bad. That would be up to you.
Anyways overall loved the place! i give it 6 gold stars out of 5!