We stayed in the King Waupouli condo A107 for one week in October. The Condo was perfect for our family of 4. The condo interior is beautiful. The woodwork is rich and the appliances are top shelf. Our unit was a corner unit which gave us 2 shays lounges. We loved sitting in the lounges having an evening drink. Every night we slept with the sliding glass doors open so we could hear the ocean.
Much has been written about the pool and it is very nice (I could see how it could get a little crowded with kids if you visited during a school holiday)
The condo also included beach chairs and boggie boards which we took with us to the beaches.
The location of the Waupouli Resort is perfect. Half way between the beauty of the north shore and the predictably Sunny beaches of Poipu. I personally love the north shore but if you are only in Kauai for 7 days you have to guard against rainy days which are much more frequent in the north. Waupouli which is in Kapaa lets you go either way based on the days weather. There are also plenty of reasonably priced (for Hawaii) restaurants within a short drive.
We rented the condo through Kauai Exclusive. They we very easy to deal with. While in Kauai we worked most closely with Patrick. He really helped us out getting me into the condo ahead of check in time and then day of departure since our flight didn't leave until 8 PM making arrangements for us to park our bags and change in another room. They really made us feel they were there to help us out.