We just returned from a 3 day stay at Ylenia's place.
It was easy to get to from Termini or Trastevere stations, and the neighbourhood was safe and walkable to everywhere.
The Casetta itself was adorable and very relaxing. The air conditioning worked very well and the terrace was huge! We didn't spend much time in the Casetta itself, but found the big bed very comfortable after a long walking day. We tried many of their recommendations in Trastevere, and they were all fabulous.
Ylenia and her husband, Alessio were very accommodating and we felt they were available to help at any time.
To sum it up, it was a nice clean last stop on a long travel schedule for us, so thanks for having us!