We stayed at Marco's apartment for four days and it was great. The apartment is lovely and really has everything you need. The location is perfect! Trastevere is the best neighborhood in Rome if you are looking for high quality but affordable restaurants and bars. We were able to reach all major sites by foot but could also reach the apartment by bus when we had our luggage.
Marco is a great host! He is really communicative and will give you all the information you need to make you stay a great experience. He was also very flexible with check-in and check-out times and was waiting for our arrival so he could show us the apartment and the surroundings in person.
Definitely would recommend staying with him!