We just stayed at Maui Kai 508 from January 19, 2022 through January 29, 2022. What keeps us from giving it five stars are a few things: The couch and chair were very uncomfortable. The couch cushions had a broken springs that poke upward and make it unusable for more than a few minutes. We could live with it being worn, but it needs to be usable.
The recliner chair was also uncomfortable and needs to be changed. All of the windows are broken and would not open properly, so no cross breezes. Lastly, the AC makes clicking and banging noises which kept waking us up.
On the positive side, the views were incredible from the lanai. The kitchen was updated and well equipped except for grilling utensils. The king bed was very comfortable.
For a relatively small amount of money, this could be a five star unit. Perhaps the owner is unaware.