AMAZING LOCATION.
We stayed for 6 nights with myself, my fiance, and his parents. It was his parents' first time visiting Europe and as such they were nervous about navigating the city, etc - the apartment is a block away from the Spanish Steps (and therefore the Spagna stop on the metro) which makes it SO incredibly easy to locate and for taxi drivers to find - truly wonderful. Also, within a 15 min walk/metro ride to really anywhere in Rome.
Pierluigi was also very accommodating and arranged a transport from the airport for my fiance's parents (they arrived prior to us) to save them from having to navigate transport themselves - a true lifesaver.
The area around the Spanish steps is very safe, has a lot of shopping (although most of it very expensive) and many cute coffee shops and restaurants. It is a quick walk to most of the sites of Rome and the Coliseum is about a 15 min metro.
The apartment itself was spotless and well kept. The beds (2 double beds, one in each bedroom) are comfortable, the AC works very well which was a big hit with my in-laws.
The bathrooms are also very clean and all in working order. One of the shower doors didn't close completely but other than that had no issues.
Keep in mind - the second floor in Italy is equivalent to the third floor in the USA so would say for those that have difficulty with stairs, this may not be the right choice. Other than that, I would happily stay here again my next visit to Rome. The apartment is just as in the pictures, Pierluigi was a very gracious host, and the location is truly unbeatable.