The location is perfect, the owners are friendly. We did not benefit a lot from the balcony as the weather was not very sunny, but it should be very nice before the real summer in Rome starts. Though one thing should be mentioned: the bathroom is very tiny (the tiniest I've ever seen in my life) and very uncomfortable to use : when showering everything around gets wet. We also found the bed rather uncomfortable and with a very small bed sheet (1,5 times smaller compared to the size of the sheet used normally for 2 people). It would be good to change the towels as well, as they seem very old. Also be cautious when using tap water for cooking - it has a lot of limestone in it, to the point that you can not drink the tea made from the tap water. We had to go outside at 11 pm to buy some bottled water.
Having said all the above, we enjoyed Rome and came to the apartment only to sleep.