The space is just the way it looks in the listing. It is absolutely beautiful, and the owner is an interior designer. It shows. The bed is one of the most comfortable beds I've slept in in many years. It was a great reprieve from the hard days of long walks in the sun visiting sites throughout the city.
Something we did not expect regarding the cost of transit in the city was just how affordable it was to take taxis from one part of the city to the other. When you are totally beat at the end of the day of visiting sites throughout Rome or the Vatican, desperate to get back to the apartment to rest or go out to dinner, and you don't have the energy to think through and figure out how to piece together the different public transit lines to get back to the apartment, a taxi is a great solution. My wife and I ended up taking a taxi twice, and we never paid more than 12€. Perhaps a helpful point of reference, it only cost my wife and me 7€ to take a taxi from the Colosseum back to the apartment. That is certainly more than the cost of a bus or the subway, but it is well worth it considering the rest your legs will get, the peace of mind you will have not having to assemble the public transit jigsaw puzzle, and the air conditioning in the taxi after being overheated in the sun.
I definitely recommend this apartment and I'm sure if you give it a chance you'll love your experience too.