The flat itself has a pretty good location within Rome, especially that the main public transportation lines are also to be found nearby (subway, buses). On the top of that, the walls of the Vatican are just 2 streets ahead from the corner. The apartment was nice and tidy, the size of it is enough for 5 people. However, when it comes to sleeping arrangements, it is definitely not suitable for 5 people, rather only for 4. The bed in the entrance hall is too small to let 2 people share it.
The apartment also has a very good price/quality measure, it was one of the cheapest in Rome, but all we needed was well-provided (kitchen supplies, washing machine, fridge, heaters, blankets).
I would give 4 points out of 5 for this experience.