My fiance and I booked a 3 nights stay at Bill. The place was clean; however, as soon ad we entered in the basement there was a strong smell of humidity/mold. We had a hard time sleeping overnight because of the smell and we actually cancelled the rest of our stay and booked another Airbnb. We thought that the smell will go away but at night it got worse. We talked with Bill and he said that he went to check out and there was no smell... however, the smell is quite strong!
Overall, they were nice hosts and helpful, maybe the time we came the basement was not enough ventilated and all the humidity stayed inside.