The good: The location is amazing. If you arrive during the day, it may seem a little "rough" with the graffiti, but that is all over Rome it seems. The area is safe and as night comes around, the neighbor elegance kicks in with a vibrant combination of local and tourists. There are 2 squares within less than 5 minute walk with many restaurants, pubs and shops. The one picture of the fountain is from the closest square (though you cannot see this from the flat). 5 minutes away is the river that has many restaurants and shops lining the colonnade. At no time did my family feel unsafe. Great area. The space itself was mostly fine. Nice kitchen and bedrooms with very good air conditioning in all the bedrooms. We did have a problem with one of the showers, but Francesca and her partner were there the next day to fix it, no problem. We had no problems with noise during the night, but then we stay up late anyway.
The slightly bad:
The listing has 2 bathrooms. Only 1 bathroom has a true shower off one of the bedrooms. The shower is very, very small and some may find it difficult to get in and out of that shower. The 2nd bathroom has a full tub and a shower hose, but lacks a shower curtain making it difficult to use as a shower. Installing a shower curtain around the tub would be a great improvement.
The flat is a bit of a walk to any major sites, but with public transportation and taxi's it is not bad at all.