Mama J's Tropical House is AWESOME! My wife and I, along with our 2 sons (12 and 10), had plenty of space to relax--inside and outside--and plenty of ways to keep ourselves entertained. The covered carport is a huge plus, especially if it's raining when you're loading or unloading your luggage :). The boys loved watching the fish, snails, etc. in the little pond, and playing in the yard. We didn't get to take advantage of the yard games that are available, but those are a nice touch!
We loved having coffee and drinks on the lanai, whether it was in the front yard or right outside our bedroom. All of the bedrooms have sliding doors, which is great to create more airflow, and the temperature was comfortable at all times. We slept with the sliding door open every night and had some windows open the entire 5 days we were there, and always felt very safe because the house is on a small, dead end street.
We were gone pretty much all day every day, so the cooler was great to put sandwiches in for picnics, and also for waters, etc. since we hiked around the volcano a couple times. The full kitchen has everything you need, including lots of little touches like coffee filters, creamer, spices, to-go coffee cups and lids, etc.
The house is very secluded, the trees and shrubs create A LOT of privacy, and it's very quiet aside from the coqui frogs, which we didn't find to be a nuisance (though maybe if we had to live with them all the time we'd say otherwise). But at the same time, you're only a few minutes away from food options, grocery/drug stores, etc.
Our only regret is that we didn't get to stay longer. Mama J's is such a great place and if we're ever back on the Big Island, we'd definitely stay there again!