I had booked Costanza's place for my parents as an anniversary gift during their trip to Italy. When I talked to them after, I only heard amazing things!
1) The constant communication beforehand and the day of
2) The gifts of wine, sweets, and rose petals on the bed to celebrate their anniversary
3) The central location. Seriously, this is within walking distance of everything you'd want to see in Rome
I could go on about how much Costanza helped in making my parents' trip to Rome a memorable one. Thank you so much for everything! When I eventually visit, I know where I'll be staying :)