Concerning the accommodation: it is just lovely with all the amenities you should need for a short or a long stay. Both the queen size bed and the sofa bed are comfortable. The air conditioner grants a cool temperature in all the spaces.
Concerning the area: in my opinion Trastevere is absolutely the best choice for having a "base" in Rome. The discrict itself is very lively and nice to visit with all its bars and shops. Moreover, you can reach all the most important monuments from this zone.
I strongly recommend this accommodation for having a pleasant and lovely vacation on Rome.