We had a bad experience and had to cancel our reservation after one night because there weren't any sheets for the sofa bed. Palma suggested sleeping in the small bed but given the 39 degrees outside, no AC, and the small size bed, that was out of the question.
The bed is more of a 1 1/2 size bed, unless the two guests are really petit or kids, it wouldn't fit two people.
The apartment is really well located next to lots of restaurants and transportation. It's walking distance to some great spots in Rome and has that loft studio feel.
However if you're planning on going in summer, the temperatures can get super hight and there's no AC, just two fans that are not sufficient for temperatures higher than 30.