We stayed in Laura's flat for a week. It is very well located - you can walk to most places or you can take a bus nearby to the train station, Monte Pellegrino and other places. There are lots of shops and a market within walking distance. It also less than 10 minutes away from Teatro Massimo.
The flat is equipped with everything necessary. The only thing you should consider when staying for longer periods is to get your own SIM with data, because the 4GB given with the stay will run out fast :)
Laura is a very welcoming host and gave us a lot of local tips. Thanks again!