The apartment that I was provided with was even nicer than the one pictured. It was a lofted unit with the kitchen and living room overlooking the street, and the bedroom lofted above a staircase (with cool lighting). Giada, who I met once I arrived at the apartment, was very kind and after a few hiccups, noticed my fatigue/hunger and invited me to lunch with her family in the apartment above.
That said, there were a few hiccups worth noting. Communication was spotty on my arrival at the Metro stop in the Chiaia neighborhood. I'd been expecting to be met there and when no one was there nor could be reached by phone, I walked to the unit myself. (Not difficult or far from the metro, just wasn't what was expected, and was confused as to why no one answered my call or responded to my message right away.)
Giada is very friendly and met me at the apartment once communication was sorted. However there was a small problem with the unit she wanted to give me (just a freezer issue, nothing major), so I couldn't fully settle into the unit for a couple hours. Not the biggest deal, and she more than made up for it by inviting me to lunch in her home.
The apartment has high ceilings, is well-decorated and well-lit. There were only a few discrepancies with what was listed. Please note there is no A/C (fans are provided) and with the bedroom being lofted it will be warmer up there. There is also no washing machine.
Last, I would highly recommend that the host provide basics like dish soap, paper towels and even some basic olive oil and vinegar for guests. It wasn't noted in the description that these would be provided, but every other apartment I stayed in (within Italy) had these small offerings, and it made it so much easier to settle in and keep everything tidy and clean.
I recommend staying in the Chiaia, it's a bit quieter (maybe not on a Saturday night!) and less trafficked by tourists than the Spanish quarter and Centro Storico. You're within steps of shopping, the lungomare, and overall it's a very nice neighborhood with lots of amenities nearby.