I strongly recommend Carla's place. Great price and quality. The apartment is situated less than 5 minutes from a subway and train station. 10 minutes walk from the main sites and places of historical center. Imma and Giani - the people responsible for taking care of the facilities - were really kind and willing to help me anyway they could. Also, Carla always kept in touch through messages and constantly asked me if i needed anything. If you want to pay a fair price and stay at a comfortable and well located apartment in the middle of historical center, this is you place. Again, i strongly recommend it.