The apartment is exactly as expected. It's very nice and in a great location, but the noise from the apartment upstairs is outrageous. On all but one night of my stay, the upstairs neighbors were making so much noise that it was literally shaking the apartment. On my final night (a Thursday), they were doing this until 3:45 AM. And it wasn't a party. This was no more than a few people, but it seemed as if they were intentionally stomping all night. And I'm not particularly sensitive to this type of noise; I lived in apartments below people for 15 years. This was the worst I've ever experienced. It was not possible to sleep through it or fall asleep while it was happening.
To Sonder's credit, they answered my texts at 3:00 in the morning, refunded me part of my stay, and offered to move me somewhere else in the middle of the night. They are a great company, but I can't ever recommend that anyone stay in this particular apartment unless they get the noise under control.