Marzia's apartment has perhaps the best location in Trastevere. You're close to everything - about a 12-20 minute walk to most major sites and you're able to wander through the streets of Trastevere and be home quickly.
Marzia's team responds very quickly to your needs and the customer service truly distinguishes them from others. I look forward to working with them again.
One word of warning about the location. The apartment is located directly across from the basilicata, at the main square, which is active with visitors until 1-2 AM in the summer. Our party - three generations ranging from 3 to 65 years old - loved the atmosphere. However, clock tower chimes every 15 minutes and thr crowds could be too noisy for others. Everyone in the apartment agreed the windows blocked the sounds of the bells and most of the street noise very well, but if someone was an extremely light sleeper, they might have some trouble. We loved it - including watching Street performers from the windows.