The apartment is very clean. Paola explained how everything worked. The WiFi worked great when the modem was plugged in.
The stairs up to the apartment are narrow and steep, which is not surprising in an old building. The apartment is small but comfortable.
The only concern we had was getting there after arriving in Florence. We followed the directions for the train, and all went well until the last step, which just said to walk 10 minutes. Our Google maps app wouldn’t work using the general wifi, so we didn’t know where to go and couldn’t call. It might make sense to take a taxi from the airport unless you are familiar with Florence (which we were not).