The pictures do not do it justice. The apartment really is right next door to the Colosseum. We had some lovely evenings enjoying a gin on the balcony with the nighttime views of the Colosseum. It is also next to the metro. Elena booked and recommended restaurants for us and although we did not meet her, prior communication was fine. The apartment is basic but it has aircon (a must as it was 43°c) and a clean and comfortable bed. We didn't spend much time there. The shower area is a tad small but does the job! You could walk to all the major sights or get the metro to the Vatican City. Highly recommend the £2 trip advisor walking tour (you leave a tip at the end). We also prebooked the skip the queue Colosseum tour. Also you're near the Orange Gardens which makes a lovely walk and some great views over Rome!
We took Elena up on her offer of a private taxi pick up from the airport as we landed late. On our return we took the train to Florence and stored our luggage for the day near the train station (Stow your bags).
The only comment I would add is the guest info booklet could have more detail on locations and recommendations, restaurants, tips etc and maybe even a guest book for guests to write their own tips.
We would recommend this apartment and would return. Thank you!