The location was really "tourist-friendly" (15min walk from Termini, 10pin from underground Manzoni and 5min from tramway Porta Maggiore) , and everything that was needed was there.
We just had some troubles with the Wi-Fi connection (suddenly disappearing), and adding washcloth with the towels could be a nice plus but all the rest was OK.
We had not seen any trash bag, so we did improvise.
The AC works well, and the penthouse is very comfortable for 2 persons.