Case Bruno was the perfect place for us to stay in Erice. It's located directly in the old city center and on a quiet street so you aren't disturbed. It's well equipped with a fridge, stove, kettle, etc for what you need while staying on vacation. It has a delightful terrace and very comfortable bed. It also has a portable wifi device that you can take with you when walking around that is v convenient for foreign travelers. Parking wasn't hard for us as we came in the off season but might be more difficult if you are there May - Sept.
Both hosts were so helpful during our stay and I can't say enough good things about their hospitality. They gave great recommendations on activities, food, local tips, and more. We recommend staying here if you are looking at Erice.