We stayed 32 days between July and August with an 11, 9 and 7 year old in tow (family of 5).
The pictures of the house online are accurate and the view and sunsets seen from the deck and lawn are spectacular. Also, Makaha beach is fantastic. Depending on where you setup camp on the beach you get a different experience. Bigger waves and some local surfers closer to the house, calmer waves in middle section near the lifeguard tower and then waves for body boarding on the far end.
If you snorkel or dive we saw turtles just about every time we went out at Makaha Beach. Other notable sea creatures spotted from time to time included, manta rays, blow fish, eels and monk seals. The reef also has some really cool topography out by the point with caves and tunnels. In summary - if you want to walk out of the house with the kids, walk into the ocean and snorkel with sea turtles, this is the place to go. As a heads up, the swim isn't too far to get out to where the reef gets good (75 yards). That said, our kids would get cold after 30 min so something more than a rash guard would be a good idea. I also bought inflatable snorkel vests for everyon as this is not a "Beaches" vacation and you should take reasonable precautions.
As for the beach directly outside the house. I can't comment on year round beach conditions, but during the summer there is no beach outside the gate (regardless of what google earth shows you). It's a rocky shoreline with some sandy patches. To get to the sandy, kid-friendly portion of the beach you need to navigate about 50 yards of sharp rocks, which requires sandals or some sort of foot covering. It's about another 100-150 yards to get to the best part of the beach which is flat. The first part of the beach is on a sharp angle that can be hard to walk, especially when the tide is in. When you do reach the beach, however, it is is covered with nice soft sand. The best water access to the ocean is by the lifeguard tower because it has a sandy bottom. Other areas can have small to large rocks in the shallow water.
As for the host, she is nice and quick to respond. Although there were hiccups during our stay they were more of a minor annoyance and not material.
As for food and shopping, the local town is 5 min down the road and has just about everything you need. If not, walmart and target are 20 min down the road. The 604 beach house restaurant was a great find nearby. If you have kids Wet n Wild is 20 min away. Honolulu is 45 min way.
Bottom line, this was a good stay for our family. Even after a month they didn't want to leave.
Mahalo