I finally got around to visiting here last spring and it was really interesting. It was beautiful and eerie and a bit dystopian in how everything is abandoned or at least partially abandoned (some buildings are still partially in use). Note that you need to book a tour to go inside any of the buildings, and make sure to choose a day when the tour is in your preferred language. The tour included very detailed explanations of the history and philosophy behind the buildings and the town -- it was also quite long (~4 hrs IIRC). I'd also recommend going into the actual town of Ivrea if you make it out there.