We enjoyed use of this apartment for our stay in Rome this past January. It was situated in a good location - not touristy. It was residential and relatively quiet. Also, restaurants just nearby were mostly occupied by locals (which we enjoyed).
Size of apartment was adequate for sleeping five. Beds comfortable and the apartment was clean. We used the kitchen to make breakfast a few mornings and it was quite functional, though it could use a toaster.
A little too cool in early January to make alot of use of the terrace, which is quite a nice feature. Wireless worked well (netflixx downloads were very good).
For five people people a single bathroom is a little tough- it's a bit narrow and only one can really enter at a time.
One small suggestion for the owner we made was to provide a second set set of keys. With five adults doing different things, coordinating access to the apartment can be tough with only one set.
Overall, a very nice experience and would recommend this apartment to others.