I highly recommend staying at Serena's place. It is a gorgeous apartment in a very beautiful part of Rome, just literally a stones throw from the major tourist attractions. Just walking the streets around the apartment will land you upon some absolute gems, restaurants, vintage shops, etc. Serena was extremely helpful with tips about the local area and tourist attractions. The place had a beautiful decor and was very safe. It was an absolute highlight of our trip. Only two minor issues to note, one is hot water runs out quickly, so ensure you have 5 min or less showers and due to the thick walls of the apartment, wifi connection is a bit hit and miss.