We stayed in a King Lanai room here on the ground floor. The room was a good size for two, and the bed was huge and comfortable. The bathroom was surprisingly large, and had a good sized shower and vanity. Our room had a little verandah out the back leading out to a cute little grassy garden looking up to the mountains above. It was a nice spot to sit and have a drink at the end of the day. Being on the bottom floor can be a negative though; while we were staying there was a family upstairs whose small child would run around the room in circles during the night, sending an unpleasant loud thudding through our ceiling. However, I'm sure that's rarely a problem! But maybe asking for a room on the top floor is the way to go.
Reception staff were very helpful and attentive, checking us in quickly and efficiently. The breakfast that is served daily is only available between certain hours - but they refill the buffet regularly so you don't miss out if you rock up near the end. The buffet consists of fresh fruit, different types of bagels, muffins, english muffins and toast. It was small but satisfying. There is also free wi-fi out in the pool area where breakfast is served. The pool was cute; it was pretty small, but not many people were around to use it during the day so it didn't matter. There is free parking out the back.
The hotel itself is in an area that seems a tad removed, down by the pier. You definitely need to rent a car to stay here. The Kauai Marriott is a short drive away, and has a couple of nice restaurants overlooking the beach. There is a small town centre nearby too. The location of the Inn is good for checking out the sights though - situated approximately halfway between Ha'ena Beach Park (1 hour drive north) and the Waimea Canyon (1 hour drive west), getting to everything is quite manageable.