We really loved this apartment! Super stylish with interesting, individual touches - the lighting was particularly cool, and all the different chairs - simple but with plenty of personality. It was also really comfortable and well-appointed with everything you'd expect.
The beds and sofa bed were comfortable, and the fluffy blankets appreciated. We didn't do any cooking but the kitchen seemed well supplied with everything needed. The bathrooms were good. Everything was easy to use, the heating worked well and was simple to adjust.
The apartment was really spacious - there were only two of us (plus an additional friend on the sofa bed for one of the nights) but I don't think it would feel at all cramped with 4 or 5 people.
The location in the north of Trastevere was great, really convenient for many things. The noise at night was mostly not too bad (we were there at a weekend, and went to bed pretty early, but in the winter so had windows shut), except for what sounded like a big fight in the middle of the night - possibly not one for especially light sleepers but that probably applies to most of the neighbourhood! We were fine with the stairs (it's on the top - 3rd - floor) but there were quite a lot of them so not one for mobility problems or really enormous suitcases.
Simona was a great host, excellent communication by message, in person, and with the folder of useful info in the apartment. She made sure to show us how to use everything in the apartment and provide us with all the information needed without being overwhelming, and I am sure she'd have been very helpful if needed during our stay - we did appreciate being able to leave our bags at the apartment for a few hours after checking out as she didn't have any new arrivals that day. Also her dog is super cute and my sister has fallen in love with him!
Would highly recommend this apartment and would definitely stay there again.