There are a lot of good things about Valerio's place. Saying it is not central is like complaining you don't have a view of Buckingham Palace from your room in London! It is in walking distance of many of my favourite places in Rome (including San Giovanni which is 5 minutes and a very important church!) and the rest are easily reached by excellent public transport links.
There is a good amount of equipment in the kitchen, which is important to me. However, there is a lot of clothing in the wardrobes and drawers in the bedrooms and you need to keep your clothes in the fitted wardrobes in the hallway.
We were a couple and 2 separate single people and had stated we needed 3 sleeping areas. Only 2 were ready for us. The double bed in the main bedroom is the only real bed. The 2 in the 2nd bedroom are sofa beds. The 3rd is a pull out bed hidden in the study (there is no actual 3rd bedroom) and we found it hard to open. I'm not sure where a 6th guest would stay.
The composition of our group made it hard to cope without a 2nd set of keys, which were never provided in spite of repeated requests. The tv worked intermittently, I think there may be a problem with the decoder.
It is great to have 2 lifts but they are very small. A disabled person needs to have a very small wheelchair which folds up and be able to stand in the lift, also to be able to manage a couple of steps to the main entrance.
A few things weren't working very well, probably because of the number of people passing through the apartment. For example one of the toilets was not flushing efficiently and a couple of bulbs needed replacing. It would be nice to have information about the nearest supermarkets and which local bars etc are good, and where to buy tickets for public transport.
In spite of all this we had a good time!