Don't think twice about booking tis apartment! We stayed with a family of four (2 adults, preteen and teen). There was plenty of space for us to all sleep comfortably. Honestly, we spent more time outside than in the apartment, but it was a comfortable stay. You cannot beat the location. Very centrally located, a lot of sites within 10-30 minutes walking distance, but the taxi stop is also a 2 minute walk away unless you call one directly to the apartment.
We chose this apartment because it was on a ground level, it does have one step into the building and one step into the apartment, as well as 2 steps in the bathroom. But for Europe, this was a great find. My husband uses walking aides but was able to manage the steps. We stayed during 95-100 degree weather and no matter what time we got back to the apartment, it stayed very cool inside!
There are two restaurants right outside the apartment door, but just a few steps more and you'll run into plenty of places to eat. There was a supermarket about a 3 minute walk away.
The only cons I can think of is that we had to pick up the key in a different location. Also, you are on a ground level apartment, if you're sleeping in the front room you will hear the music, walking traffic and people coming and going into the building at night. This was not a problem for us, we enjoyed the liveliness but we can also sleep through quite a bit after an exhausting day of sightseeing. Just something to consider. Also, the window can be closed and that really minimizes some of the sounds.
If we are able to come back to Rome, we would love to stay here again, the location was just great and close to amenities, shopping, and sites.