Great location. we really enjoyed Piazza Armerina. It was really nice to be able to walk everywhere and visit the cafes and restaurants by foot. The Duomo is very beautiful and is just up the little hill.
The close proximity to the neighbors across the alley was a problem however. The had a family with 3 young children and the noise carried directly into our apartment until midnight when the windows were open. Other than that we had a very nice stay.