We stayed for three nights with our two children ages 8 and 11 during the first part of our weeklong big island trip. We loved the location- the beach out front was gorgeous and we saw turtles. We loved sleeping with the windows open and listening to the surf lull us to sleep. The condo is super close to the main Kona strip, but just far enough off of it to feel more peaceful. My husband and I ran along the street each morning. We also loved the pool and the hot tub at night. It is close to many of the best beaches and other activities. Some of the things we did: Surf lessons at Kahalu'u beach park and snorkeling, night snorkeling with the manta rays, Luau at the Royoal Kona Resort. We ate at Da Poke shack twice that is in the building- super friendly people, just be aware the run out frequently in the late afternoon.
We did use the sleeper sofa and found it to be just fine. Just note it is four flights up and there is no air conditioning (none of the places we stayed at had it). This was not a problem for us, and we enjoyed the privacy of the location of the unit and found the building to be quiet in general. We would definitely stay here again and highly recommend it!