The apartment location is excellent! If you arrive by train at Santa Lucia Station, you must take a Vaporetto to Rialto and walk two blocks, and you will be there. I received directions on how to get to the apartment a week before, which was very handy. There are lots of stores and restaurants close by.
There is no elevator, and the apartment is on the second floor.
As others have mentioned, they don't release the apartment before the check-in time (3 p.m.), even if it is available. They told me that the codes are generated automatically at 3 p.m. only. The comms with property management was ok; they have WhatsApp, which was very convenient.
The area is quiet, and all windows have shutters, so it gets dark to sleep. The beds are very good.
The apartment is big and has a lovely family room with a TV. One of the Air conditioning equipment is in the family room, and the other is in the kitchen, so you will need to sleep with the bedroom doors open if you need the A/C.
The apartment doesn't offer a coffee machine, not even a Bialetti, so if you are a coffee addict, bring your own Bialetti.