The apartment is very well located, quite comfortable, and with good connectivity. All really good, except... It was really challenging to get the registration process finalized without having a US phone number. Took quite a bit of time and generated a lot of frustration. Definitively have to make the process more straightforward for those without a US phone number --or at least clarify this limitation in your post.
Then everything went well, until the very last night, when my access code to the building stopped working. I tried to contact but did not get a reply. Only the following day I got a message back from an agent saying that (guess what?) they tried to call my phone number, which, of course, does not work in the US! Please add an option for immediate communication other than phone (there are multiple apps that work as phones internationally and that pretty much anyone use for communication). I was just lucky that somebody let me in. I never got an explanation of why the code stopped working (which makes me feel it may happen again). Also, they require you to register and create a Sonder accountant taking you out of the Airbnb booking process. Quite weird. It should all be done through the Airbnb platform, should it? Other than those (important) issues, the apartment was great.