We arrived at the unit around 9:00 p.m. and immediately noticed a very strong musty/mold odor, especially in the bedroom, although it was present throughout the unit.Within a couple of hours, I developed asthma symptoms and hives that I believe were triggered by the conditions in the unit. My husband and daughter also experienced headaches and dizziness while there.Because of our symptoms, we did not feel comfortable remaining in the property and checked into a different hotel instead.When we spoke with the Mana Kai front desk, we were told that because we had booked through a separate management company rather than directly through Mana Kai, they were unable to assist us with changing units. A front desk staff member also told us there had been ongoing issues with that particular unit.While we were there, another guest was also at the front desk complaining that their unit was dirty and had a bad smell. They said their unit was also managed by Vacation-Maui.Vacation-Maui was responsive to our concerns and refunded the remainder of our stay, although the first night was not refunded. They also told us they would send maintenance to inspect the unit.Unfortunately, because of the strong odor and the physical symptoms we experienced, we were unable to stay at the property.