Yes, the view really is that spectacular. A full 360 degrees over the rooftops, including a direct line of sight to St. Peter's. It truly is stunning and unique. You won't find a better view in Rome, certainly not for the price.
The location is perfect, especially as first-time visitors to Rome. Many of the major attractions are within a 15-20 minute walk, more than you can realistically see if you have less than five days in the city. Plenty of fantastic restaurants and shopping within a 10 minute walk. We loved the Caffeteria on the ground floor for morning coffee and pastries, and the enoteca a couple doors down was super convenient for grabbing a bottle to sip in the view room or on the balcony.
We were very suprised by how quiet and dark the bedroom was with the automatic shade down. It's helpful for kicking jetlag and getting a good night's sleep in an unfamiliar place. The whole apartment was quieter than we expected, being in the middle of Rome and all. Check-in and check-out were quick and painless. Luca was a dream to deal with.
Things to consider:
This is an old building, which means the plumbing is delicate, but really that's the price you're going to pay for this kind of place. We never had any actual issues, it just felt like we needed to be careful or we might, if that makes sense. If you want modern plumbing, stay in a new building or hotel.
The ceiling beams are low in the bedroom and both bathrooms. This didn't bother us, as we used those rooms for only their purposes and little else. But super tall folks should be prepared for some amount of ducking and hunching.
The stairs up to the view room are narrow and steep. It was very noticeable day one, but by the time we left four days later, we were navigating them with ease. Again, it's an old building in an ancient city- they didn't waste space unnecessarily. But people with mobility issues might find themselves unable to take regular advantage of the view room that makes this place so special.
Keeping in mind these caveats, we would absolutely book this place again and recommend it wholeheartedly. It's one of a kind!