Stayed a week in Carmen's apartment. Worked excellent as a hub for exploring Rome! Nothing fancy nor especially beautiful about the place, but a quiet, clean and perfectly comfortable apartment to return to and rest after a full day's exploring. Well working heat, shower, bathroom, linens and wifi, so basically everything you need (you don't want to spend that much time in the apartment anyway when you got Rome outside its door). Together with the included breakfast at the restaurant I would say you got excellent value for money, especially if you are a couple.
Really pleased with the breakfast. Was a bit worried there would only be sweet pastry and coffee, but was pleased to find a simple but perfectly good selection of cheese, hams, salami, bread, fruit, something baked, boiled eggs, yoghurt and cereals (and sweet pastry should you want it that early). Perfect for charging your batteries either before your outing or on returning from a morning visit to any popular place where you've managed to beat the crowds (breakfast is served 8-11).
Perfect central location for exploring all the inner city areas! Walking distance to everything from the Vatican to Testaccio and Trastevere to Villa Borghese (depending on how far you are comfortable with walking of course). When you're done walking there are pleanty of buses or trams to get you to and from the apartment (subway is quite far away though if you didn't already know, never used that). If you do not feel like eating too far away from the apartment some night, there is an excellent choice of restaurants and aperitivo places nearby. Personally, good food and new flavors is a big part of travelling and I had some (but not all =)) of the best food experiences in Rome in places close to the apartment. Some of the places were on the list that Carmen has posted in the apartment, others you can research (like e.g. Roscioli). The neigbourhood can be quite noisy in itself at night since you have Campo dei Fiori nearby, but since the apartment is well shielded from the street you will never hear this when being inside.
Otherwise always very fast responses from Carmen, good help with finding your way to the apartment, and no hassle at all with checking in or out (though I never got to meet Carmen in person, the staff at the restaurant took care of that). Just be aware that the double bed is not a particularly soft one in terms of Western standards. I slept very good there, but you might not be comfortable if you prefer really soft beds.
All in all, got what I expected and a little more, thank you Carmen!