Shannon's condo was exactly what my wife and I needed for our week in Kauai. The unit was very clean and well appointed. The Islander by the Beach complex is a little older, but it was very well-kept. The pool and hot tub are on the smaller end and we're somewhat crowded, but that wasn't really an issue for us, as we spent most of our time exploring the island.
The unit is centrally located on the outskirts of Kapaa, which makes either a drive up to the Canyon or to the North Shore very reasonable.
The complex is very close to several restaurants and shops (including a great shaved ice spot), but we recommend making the drive into downtown Kapa'a for some more authentic options (the Pono Market and the Musubi Truck were two standout options).
It was a great place to stay for our trip, and we highly recommend staying at Shannon's place.