My husband and I had a fabulous time staying at the Hanalei Bay Resort. #3201 & 3202 could definitely accommodate 4 people, but we felt it was just the right size for two people. It is nicely decorated, has a king-size bed, and has pretty much everything a guest needs for a stay in Kauai, including beach chairs, beach umbrellas, and nice bathroom amenities. We enjoyed cooking our meals and eating them on the balcony, which has a spectacular view of Hanalei Bay. The kitchen is on the small side, but it has all the amenities which, despite a few dull knives, were in perfectly good condition. Also, there's a parking lot very close to the condo, which was great. Made it very easy to carry luggage and beach gear to/from the car.
The Hanalei Bay Resort is lovely, with a nice pool and beach access, which it shares with the Princeville St. Regis. It also offers a bunch of activities, both on land (such as tennis) and sea. And if the Hanalei Bay Resort doesn't have a specific activity (such as paddle board rentals), check with the activities desk at the St. Regis. You don't have to be a guest to rent some of their equipment, which we found out one day hanging out by the beach. It's a very family friendly place with plenty to do at the resort, but we mostly enjoyed visiting other beaches and sites in the area. You are only a few minutes drive away from both Princeville shopping center and Hanalei, so very easy to get around.
Overall, we had a fabulous experience and would definitely come back to this rental again!