We stayed 6 nights in the appartment and loved it.
It has everything you need and the location is perfect; in Trastevere near all the restaurants etc but still away from the busy touristy streets. The flat is on the top floor which makes it very light. Extra plus for the little balcony facing south.
The bar across the street was quite noisy so I would recommend that you bring ear plugs.
All in all, we were very satisfied and would definitely stay here again!