We stayed at Viktor's place for 2 nights. Its a great location, right in the middle of everything. Max 30 mins walking anywhere. Lots of restaurants nearby. Bus stop 1 min walk away. Its not on the main street so its not noisy. It was clean and had a fan (he had an AC unit that he was getting fixed). It wasnt too hot in the room though if you have the fan on. You share the apartment with 2 other guests. Only saw one of then once. You have to go up a flight of stairs, but its manageable.
Viktor was really accommodating. He let us check in early, since our flight arrived at 9am. Then he let us keep our bags at his place the day we checked out, since our flight was only at 8pm. If you have any questions, just ask him. He responds pretty fast. He does not stay in the same apartment with you. He's a great host. I would definitely go back, especially because its right in the centre of Rome. We walked to everything!
Thanks Viktor!