The apartment is an absolute gem - located in Porta Venezia, and only a couple of minutes away from a Metro station. It exceeded my expectations in almost every regard.
The apartment itself is tastefully decorated with the mementos of Umberta, the flat's owner - including masks from Africa, works of art, and comfortable furniture. The bed is comfortable, air conditioning worked well, and the internet supported frequent video calls. It is clear the hosts have thought through the details - including ensuring, despite the lack of kitchen, enough appliances (fridge, panino maker, microwave) to keep you going, and other small details that made the experience very comfortable.
The location itself is also stellar - close enough to Centrale without being seedy, and located near several lively and vibe-y restaurants and cafés.
The only (slight) thing to be aware of is that the flat is effectively carved out of a larger flat. They are divided effectively - but you will occasionally hear small noises from the neighbouring apartment - which I didn't mind as it is very much part of life in one of these old, Milanese courtyard-style apartment buildings.
Thank you for a lovely stay! 10/10 experience overall.