Overall, our stay was great. Giuseppe welcomed us in the building (despite it being ~11.00PM) and showed us around the house during check-in, he would send a text every day checking that everything was alright, he even arranged the ride from the airport to the apartment for us and left us drinks in the fridge and breakfast on the counter. The place itself has 3 spacious individual rooms and a bathroom with all the necessities. It was also very clean, and the kitchen had plenty of equipment for us to cook for the week. The A/C in the apartment was also a lifesaver, and the terrace had beautiful views of the Spanish Quarters and the Castle Sant'Elmo which you could enjoy while eating outside. Compliments to the host for being very kind and patient with us.
The only things you should note before renting the apartment are that it is a 5th floor apartment with no elevator (or 6th if you consider the ground floor the 1st), and that the Spanish Quarters can be quite rowdy, especially at night. I would advise against strolling around the area past 10-11PM. We washed our clothes at a laundromat, however the host kindly offered to wash our clothes for us (he lives downstairs - and is almost always available).