This unit is a great value in a very convenient location. It's a 10 minute walk to Poipu Beach and is very quiet. The heat was not an issue; if you open all the louvres on the doors and windows, you will get a great cross breeze.
I'd overlook most of the cons below given the price of this place. Comparable units are priced significantly higher.
Pros:
Location
Quiet
Clean
Decently stocked kitchen
There's actually 2 showers in the one bathroom
Only 1 key (pretty inconvenient for your group to split up)
Cons:
Leaky bathroom smelled like mildew
Host communication spotty
Unsecured slow wifi network
Stove burners are not level (not fun for cooking anything besides boiling water)