We had a wonderful stay in Cristina's apartment in May 2013 and highly reccommend it! The room is small but nice and clean with a good bed. The apartment is centrally located 5 minutes walk from St Peter's square and 10 minutes to the metro and city center. It has everything you need (kitchen, bathroom and a big roof terrace). Little shops and a lot of nice restaurants are nearby. Cristina is an excellent host, very easy going and always willing to give you good advice (since she is a tour guide herself). Don't forget to ask her for the best Ice cream in Rome, you won't regret it! :)