Gildas's apartment is excellent, and it's location really helps bring out the whole "live like a local" promise to life.
We were looking for something central, so we could explore Rome in an easy way, but at the same time we didn't want to stay in a touristy location. Gildas's apartment is right next door to the colliseum (it's right there, looming large over the city, once you walk 30m down to via Serpenti), but in a part of town that has a very local feel, with some great restaurants and bars close by. The apartment itself is very comfy and spacious, with a beautiful balcony, and quiet at night for a good sleep.
We had an excellent 7 days in Rome and Gildas was very responsive and helpful whenever we had questions. Definitely a must-stay apartment!