Casa Winkler was a great place to stay - especially if your primary focus will be towards Vatican City. The apartment is close to there, and a fairly short walk to the metro, for a quick ride to the rest of the main tourist areas in Rome. A grocery store is just a couple blocks away if you need groceries, or inexpensive snacks. The restaurant immediately to the left, with a few tables outside and the rest down a short staircase, after you walk out the front door is an excellent place to get dinner. Luigi has lots of tips for you as well, when you meet him to check in.