As everybody else has already noted Andrea's place has a superb location - Colosseum is literally around the corner, and on top of having a gorgeous view with our morning caffe this saved us tons of time as we were exploring nearby area during our stay - Colosseum, The Palatine Hill and Roman Forum. If you don't have much time in Rome and want to use every minute of it I highly recommend booking Andrea's place.
Andrea was extremely helpful during our stay, from booking a limo at the airport for us ahead of time, to making the check-in super-easy, to providing maps and tips about local places, and even to to making us some nice welcome gifts (thank you Andrea!). Communication was outstanding! Very quick and detailed.
We liked the apartment very much too - clean, it had everything we needed, quiet at night (3rd floor and quality new windows), and having elevator was a big plus too (tight but capable of moving us and our bags). A/C worked perfectly and it was very nice to have a dishwasher!
We would love to stay here again when we come back to Rome!