First off, our hosts were amazing. Fast responses, easy check-in, and access to their kayak, paddle board, snorkeling gear, washer/dryer, and a bunch of other stuff in the main house made it a great stay.
You really can't beat the location of this place if you're looking for your own private beach. The cottage you're staying in is a short walk, maybe 50 yards, to the stairs that lead down to the sand. For most of the day on weekdays there was no one else around, as this stretch of beach is kind of separate from the main Waimanalo beach. It's also a short walk to the turtle pond, which is great if you have small kids; the pond is protected from the waves and the water is very clear. It was a great training ground for our kids to try snorkeling in the ocean for the first time.
Having said that, this is not a cottage for everyone, so just a quick warning: if you require air conditioning (we do not) then be aware that you're relying on the ocean breeze and the numerous fans in the cottage to cool you off. The kitchen does not have a stovetop or oven, but it does have a hot plate, microwave, and an amazing combination air-fryer/toaster/convection-oven. That last appliance alone could have gotten me through the week.
Proximity to Hanauma Bay was a big plus for us. You're also very close to Sandy's, Hālona Blowhole, and Makapuʻu Point. Our hosts also gave us great advice on local spots to eat. All in all, we could've stayed here another week and been very happy.