We had a lovely stay at Michele's place in Trastevere. We stayed for two nights and had the best time.
Albeit small, the place is very clean, tastefully designed and very well organized, catering for your every need, with a fully equipped kitchen, a washing machine, a fun sitting area etc.
There are no windows though, which is a drag, but you can open the glass door and get a breeze.
The location is perfect! A quiet alley, one step from the most lively Trastevere lanes with all the cool bars and restaurants, and a walking distance from the city main attractions/historical sites. (We bought a Roma pass but never used it for transit...we walked everywhere.)
The bed is comfi and the bath towels are nice and big!
Michele was kind, curtious, helpful and extremely prompt in replying. We thought, however, that there were a bit too many rules and formalities while booking and checking in and the cleaning fee was higher than we knew before.
All in all, a great place. Highly recommended.