Just back from a few days at Andreas apartment. Entry instructions were posted well in advance and easy to follow. The apartment is clean and spacious. The 2 bathrooms really helped and the kitchen is well equipped. It was an excellent base.
The real winner is the location. Though the accommodation is quiet, it's in the heart of everything and the likes of the Vatican, Forum, Trevi and Colosseum are all in walking distance. There are also plenty of shops, bakeries and eating places withing 100m so you don't need transport.
Would thoroughly recommend this apartment. Especially for a weekend visit when you want to cram in as much as possible