We had a great stay at Simona's. House is a 25-30 minute walk from St. Peters Square. It was so lovely most of the time we walked. A cab is about 15 euros, Uber is ranges due to peak time. Def buy your tickets in advance cause the Vatican and Colosseum sell out. Purchase the skip the line. Otherwise you could wait in the long line for hours. We purchased 48hr Hop-On-Hop off tickets it was sooo worth it. Give yourself plenty of time to wander and get lost in the streets simply sightseeing. Wear comfortable shoes...if you'll do a lot of walking and the cobblestone is hard on the feet. We didn't spend much time in the flat but it is very nice. Clean - chic - and a great safe place to sleep!
Thank you Simona for a great stay- wonderful host - very helpful - lots of tips!