Caroline's place is conveniently located near the Alo Moana center; it's only about 7 minutes' walking distance. The room is a bit small, but overall this is a great place, considering the price is much cheaper than those Waikiki hotels and free parking (garage, usually $35 for the hotel parking). I would highly recommend Caroline's place to anyone. There are also bodyboards, snorkeling gear, beach chairs, and multiple umbrellas.
BTW, don't forget to read the manual thoroughly before you text Caroline for questions about bathing tub or electricity (like what I did). But it is truly amazing how fast Caroline replies to messages.