We stayed at Veronika's penthouse/apartment for 2 nights and found the location of the house to be absolutely perfect, as it is right in the heart of the vibrant and hip Trastevere neighborhood. We were on the topmost floor of the building, and while it was challenging to climb 90 steps (especially with our luggage), the rooftop terrace and open living room space made it worth it. The apartment had a lovely decor overall and was clean and well furnished. The check-in and check-out process was a breeze and Veronika's friend Samuel who checked us in after our arrival, was always responsive and helpful. He also let us check-in a little early so we could leave our luggage at the apartment.
The only reason I am not giving 5 stars is because it rained for a couple of days in Rome (this was in late November) and unfortunately, there was water leaking from the roof in multiple places, including the kitchen and living room. We noticed this especially on the first night, and we ended up having to put bath towels on the floor to ensure the floor stayed dry. Luckily the water did not damage our luggage. After contacting Samuel, he mentioned that it is something that can happen with the rooftops of old buildings, however the fact that this was perhaps a known issue, we were disappointed that it was not fixed before our arrival. While the water did not really bother us, we spent some anxious moments at night and were worried that the water may leak into the bedrooms (which thankfully it did not).
All in all, the location of this apartment is fantastic, and the hosts are very friendly and helpful, but if you are going during the rainy season in Rome I would double-check that the issue with the roof leaks has been resolved.