I didn't get a chance to meet Yann, but he was very friendly and speedy in our correspondences. I rented the place last minute for my family while they were visiting me in SF, and despite having lived in SF for 6 years, I was still surprised at the unit given the price: small, low ceilings, very sparse decor. To his credit, these were all noted in the description.

Overall, I'd say to look at other places if you're a bit flexible with price. The unit is clean though, and that neighborhood is safe.