It was a real pleasure to stay at the Comfort apartment Mariniana.
It is a very nice and cosy place, everything was clean and you really get what you see on the pictures :-)
The location was also good as it was quite close to the Vatican - so if you like walking, you can reach all the important areas by foot. It is a bit noisy given it faces a main street - but nothing dramatic.
There is a lot of places to take a coffee or buy groceries and also a super good ice cream place La Nostra Gelateria right behind the corner.
I would definitely recommend this place for a weekend or even longer (we stayed 10 days)