Royal's place is a great deal.
Pros: very conveniently situated to go anywhere on the North Shore, get groceries, restaurants. Good Wi-Fi. There is a mini-kitchen setup and grill which allows you to cook (we made over half our meals using delicious local ingredients and saved a lot of money). He provides a ton of beach gear (chairs, umbrella, tote, boogie boards, snorkeling gear, etc.) so you don't have to rent any yourself. We have sensitivity/allergies to fragrances & some cleaning products and Royal was able to accomodate us by using fragrance-free detergent to wash sheets and towels prior to our arrival. He is very responsive--when the gas ran out in the propane grill, he was able to get it fixed in less than 24 hrs.
Cons: may not be best for people who are sensitive to noise when sleeping. The unit is next to one of the main roads into Princeville so you have some street noise from cars.
There is a window-mounted fan unit which provides nice airflow, but also causes street noise to leak in. Also Kauai has wild roosters everywhere and they will crow (sometimes incessantly) in the morning around 4-5am, and this noise will also filter in.
Overall: extremely good value that is hard to beat, and provided most of the gear we needed to have good beach time.