We choose to stay in Upcountry to make a convient Road to Hana drive and to balance out the few nights in Wailea where it's more developed. The cottage was sparkling clean. About 15 min to Pa'ia and other cute small towns but haiku is only 5 minutes. Driving to town and around didn't bother us but know you need to do it.
When we stayed it was high 80s/90s and the place doesn't have AC. Because we were out during the day and it cooled down at night it wasn't a huge deal but I think it would be uncomfortable if you were at the house during the day.
I felt the price was expensive for what it is but I suppose it's Maui prices.
We were able to check in early and the owner and manager were super responsive!