We (two adults and two kids) spent a month in Greg's place and it was great. Few major perks:
1. Couple minutes walk to the awesome beach (more about it below)
2. Clean pool (for kids) just outside of the patio.
3. Kitchen is equipped with all the necessary tools. We cooked constantly and experienced no issues whatsoever. Though I brought knives with me along with few more exotic things.
4. Patio. Unit is on the first floor and the patio with umbrella and chairs seamlessly connects to the lawn where kids were playing a lot.
5. Kihei in general is placed very well in the middle of the island with good proximity to main attractions.
Charley Young beach that was our "back yard" is an ideal family beach - gradual, shallow water entrance, clean sand, decent size, not crowded. Plus tide pools in the rocks with crabs, shrimps, baby morays, lots of fish - it was a constant show during low tides. Plus turtles - they were always there, just put the mask on, swim ten feet and watch. Our 3-year-old kid learned to snorkel during this trip mostly because the closest beach had something to look at (though best reefs required some driving)
But there were few minor negative things:
1. There is no AC in the bedroom, and if the door is closed (kids went to sleep before adults) it become quite warm there. With an open door, AC in the living room covers the bedroom as well, so during the nights there were no issues.
2. Unit is quite dark - as it is on the first floor with a walkway nearby, we had to keep curtains closed most of the time.
Greg was very responsive and helped with a few asks we had during our stay.
So great location, host, and value overall. Especially for families.