We were in Maui for about a week and stayed at Josh's place, with my in-laws and several children.
Communication was near instant, even when I had initial trouble trying to get in to the house as well as other questions before/during/after my stay.
Some previous travelers noted an issue with ants, and I do agree that this is an issue. However, consider that because you're on an island, seeing ants and other bugs are almost always going to be the norm. There was ant/bug spray available at the house and depending on your comfort level, YMMV.
The views in the backyard, even when rain would fall, are amazing and the pictures aren't enough to see for yourself. Because you have to see it for yourself!
Overall, I would definitely come back. I already miss it!