We stayed Winter 2021
Location
Great location, but some clarification is warranted, your 'exclusive access" to the Mauna Lani Beach Club is really about parking. You will have parking lot access to the Mauna Lani Beach Club before it opens to the public at 5pm. The beach itself is open to the public all day. Great snorkeling. The restaurant there, Napua is excellent, with an A+ wine list.
Not to be confused, facilities at the Mauna Lani Resort (Auberge) are only for folks staying at the hotel, though the beach is also open to the public. This was confusing, so thought it might be helpful to share.
About the house
Big house, but the description isn't quite clear. There are three "pods" that make up the property: 1) the one with two bedrooms, each with their own bathroom, decent sized, 2) the one with the master bedroom, massive, and separate shower, 3) and the main house with the kitchen, pool, and the "Study" which is passed as a 4th bedroom, with a murphy bed - which isn't disclosed until you book. There is a sonos sound system throughout, however, oddly, the "Study" is on the same "channel" as the pool, so if you have the music on outside, it will be on in the study. Not great to find out when you have a baby napping in the "study".
If you need four rooms, whoever gets the "study" will be disappointed.
Kitchen
Not completely stocked with the basics, which is disappointing at this price point, but the supermarket is close enough. 1 paper towel roll and a sponge that wasn't in great shape.
Pool
This is probably be a great summer pool, not so much in the winter. They have a hot tub, heats to high 90's then shuts off at 30 minutes, and starts pumping in cold water. The pool is capable of being heated, but they don't offer that as an option, not even a paid option. Most of the year the heat is probably not necessary, but it would've been nice to have during our week's stay. The pool is really nicely shaded, but it doesn't help in the winter, we only used the pool once - big bummer.
They have a grill outside, but for a large house, with 3+ bedrooms, the grill is small, with only 2-burners.
The Booking Process
They have a post-booking process that was a little much. They were relentless in getting us to fill out forms, which they used to upsell/cross sell, when we tried to book cribs through them we were ghosted.