We stayed at the Kapalua Bay Hotel last year in June. We have since been to Honolulu and Kauai and have visited several beaches there and absolutely feel that Kapalua was the nicest. We had heard about it and were a little surprised when we got there because it was smaller that we had expected, but once we got over that, and expecially after visiting Waikiki and Poipu, we still feel it's the best.
We stayed 10 nights on points, which we are just now recuperating from, but it was well worth it. We found that most other guests were there for a shorter time. I like not moving and 10 days on one Island is very relaxing.
The hotel and grounds are beautiful. The rooms are a nice size and we had oceanfront rooms so the view was spectacular. Nice size bathrooms and we had two doubles and a sitting area. The furnishings were okay, but not spectacular.
The bell staff was the best! They clued us in that they had small refrigerators for the rooms (I don't think there was a charge). They gave us guide tapes/CD's for the Road to Hana and Haleakala.
We brought our own snorkel gear and even our own beach umbrellas, which was absolutely fine. Be sure to buy some of those little packets of fish food from the beach shack. You'll get some great underwater pictures.
We had the seafood buffet, but felt that it wasn't worth the price. Breakfast was included and was unbelievable. Didn't even need to have lunch!
Let me know if you have any specific questions.