The Surf Shack is super cute.
The goods:
Kasey has cultivated a very stylish space with lots of local goodies.
There are some local snacks and coffee to start you off and the kitchen is well stocked. There are also some basic toiletries available in the showers.
The location is good for access to most north shore attractions - about half way between Hanalei and Kilauea.
The not-so-goods:
Perhaps we came at the wrong time of year, but it was very hot in the rental all of the time. There was no breeze flowing through which made it miserable to spend any time at all in. Even on the Lanai, it was quite stuffy from about 8am-8pm.
The bedrooms don't have blinds or blackout curtains. The lights from the parking lot and paths shine in all night. It is not good for sleeping if you prefer sleeping in the dark.
Overall, I personally wouldn't stay here again, but I would recommend it to others with the few caveats above.