Zero sound insulation whatsoever. I stayed in room #3 and there was constant noise from upstairs. The only way I could describe is it like a stampede - someone literally taking giant heavy footsteps back and forth ALL DAY. It even made my closet doors shake at times. And this goes on late through the night. I had poor sleep each night and had to cut my stay down to 1 week (originally booked a month). There was a serious ant issue but Yumi did come in and treat it when chemicals. I was annoyed that she tried to blame the spices in the cupboard for the ants though, and even tried to say it's just a San Francisco problem not know Bing that I'm a native and have lived in SF for 25 years. Even with spices and seasoning in cupboards, never had ants swarming a kitchen like that. I had ants in my bedroom too and a few crawled on me which was really disturbing. The key to the front door is really screwed up so me and the other guests struggled to get in for 15-20 minutes multiple times. Yumi initially said this was a better key than the last and after complaining to Airbnb she finally gave me a better key but keep in mind they still didn't change the lock so the key you get might suck too. The apartment is a hastily converted basement so the sound insulation is honestly horrible - you will be able to hear every conversation from surrounding rooms. Although the amenities are there, what's the point if you're struggling to be at peace throughout your stay. Sorry, this is first time I have to say it, but I wouldn't stay at this AirBnb again.