Saichi's place is great. It's close to bus lines that allow you to get everywhere quickly. For instance, it was very easy to get a bus to both Pearl Harbor and Hanauma Bay. The apartment is within a fairly close walk to beaches, but the resort hotels have made it very difficult to access such beaches, to be completely honest.
The apartment is extremely clean; the bed is comfortable, and there are a few small, nice touches. Saichi has left scuba gear in the apartment if you have any desire to go snorkeling, and past guests seem to have left half a dozen containers of sunscreen. So we'd recommend this sport for folks visiting Waikiki.