Thanks for being responsive and helpful. The apartment is beautiful and very comfortable. I had a lot of trouble with my early-check-in request - which wasn't confirmed as not possible until that morning, which was quite inconvenient timing.
There is a whole lot of additional bureaucracy required to confirm the booking, and check in requiring documents to be uploaded, a verification process, a separate app to be downloaded, and then a complicated digital lock system to access the apartment. It was incredibly onerous and time consuming and then also failed to work. It's really a shame because the apartment is gorgeous and in a great location, very comfortable, clean and quiet.