I strongly recommend this place. We chose it after another place that we chose wasn't able to acommodate us and I must say that I do not regret choosing La Bonosa!
Host is absolutely great - Luca is really helpful and writes back really quickly. He was able to answer any questions that we had and guide us on checking in. Apartment itself is all we needed for a couple - cosy, beautiful studio. Fully functional and equipped kitchen and bathroom with hot water. King size bed is very comfortable.
Location itself is one of the biggest pros of this property. Located right in the heart of Trastevere with dozens of restaurants, bars and walking paths we greatly enjoyed our time in the neighborhood. And it was close to every big tourist attraction that we wanted to see - we visited Colloseum, Vatican, Trevi, and many other and we didn't have to use the bus or taxi even once.
Five stars and we will most likely come back!