This is the perfect location to visit St. Peter's, Vatican, etc. Nice neighborhood, close to restaurants, grocery store, and metro.
Marina was very helpful, especially when our taxi to train, was in the wrong location and we needed help to get another one to make our train.
Although this is an affluent area of Rome, always wear your backpack in FRONT of you. I was pickpocketed at night and fortunately only lost an inexpensive jacket.