If you want to stay in a perfect location in Waikiki with your family, This is a perfect choice.
The location is a gem. It literally a two blocks walk to the Kuhio Beach in Waikiki. You can just grab beach chairs and towels and walk to the beach multiple times a day to enjoy the sun. Kuhio beach has the walls block the wave so it's perfect for kids to swim. There are tons of great restaurants and bar in Waikiki too. They are all in walking distance.
When we stayed there Sean's place had six beach chairs, two beach mat, two beach parasols(one is broken though), four snorkel sets(including fins), and four beach towels. I might missed something. There were all free to use. You can save a lot of money to rent them!
Diamond Head park is also in walking distance. I ran on a path around Diamond Head in many mornings and it was awesome.
The two bedrooms have their own bathrooms and ACs. It's perfect for two couples or family.
THE SHOWER HEAD! You might miss this in Sean's instructions document(which he send you earlier via email) because you would think you will figure out any shower head in the world without instruction. Think twice and make sure you read the instruction. I bet you'll never figure out how to use the shower head in the small bedroom on your own. I was so sure that it was broken and later I found it in the document. It worked very well.
Sean was an amazing host. He doesn't live there and I've never met him, but he responds to the AirBNB message within 5 minutes most of the time. I accidentally broke one of his water glass and he said don't mind.
I'd definitely come back to his place next time I go to Waikiki.