The biggest problem was there were bugs. There were a lot of tiny bugs and a huge centipede that came out of the shower drain. The kitchen also had a line of ants.
Without the bugs, I'd rate the place as 3 stars. The location is great, but the place seemed quickly thrown together. The parts we couldn't overlook were - 1) it had a constant smell of sewer water 2) the quality of the construction was rough (the bathroom door was a door that just lay over the opening of the doorway and didn't provide a seal. It was also really hard to close.) and 3) it wasn't cleaned properly - there was dust on the tables and a Starbucks stopper right by the bed.
The other part that threw me off was communication with Zack. He was very quick to respond, which I give him credit for; however after we sent him pictures, he never followed up with actually solving the problem. Instead he just kept asking me to give him a 5-star review. If he actually focused on trying whatever he could to get someone to help us with the bug problem (even if he couldn't get someone to actually come over), it wouldn't turn us off. I would want to stay at a place where the host cares about trying to make the experience comfortable for the guests, instead of just caring about getting a 5-star review.