Spent 4 nights in July...even nicer than the pix suggest - the upstairs bedroom is gorgeous and also shared the same view as the terrace from the window. The entire apartment is very tastefully decorated.
The terrace is lovely however since it was in the mid 90s during our stay it was too hot to make full use of it - must be heaven in the spring.
Powerful AC in each bedroom which is essential in the summer.
Location is absolutely prime - you're a 2 min walk to taxi stand, 5 min walk to Spanish steps and the street itself is lined with high end shops (Chanel, Miu Miu, Brioni, Chopard etc...)
Also grocery store, inexpensive cafes and the like all around the area - we ate breakfast in the apartment each morning (it just got too hot on the terrace after 8am - again though, this was the middle of a very hot July)
Place is very quiet since it's high up enough and just far enough from the Spanish steps that you really don't hear a thing.
Aldo the owner was welcoming and had prosecco and snacks waiting for us as well as a stocked fridge which was so appreciated - he lives in the building and he and his son were always there for recommendations or questions we had. His son even carried our massive luggage up the stairs for us!
Emiliano & Maria were also super helpful and responsive for anything we needed before our stay including arranging transport and giving us tips on the train.
Only thing to be aware of is that there is no dedicated AC unit in the living room, it relies on the loft bedroom unit to cool down - we helped this with a fan but spent most of our downtime
in the upstairs loft area.
Great stay - highly recommended!!!