Roberta's place is really nice and by far the best part is the terrace. It looks out to the sea and is just so relaxing.
I know some reviewers have mentioned the area, but we felt safe and it's close to the centre of town (albeit an uphill walk on the way back) but far enough away to be quiet. We had the best night's sleep of our trip so far here.
If you are driving, please make sure you take note of Roberta's instructions on how to get there as I had stupidly i'd forgotten that she'd sent them to me and we ended up taking a route via some very narrow backstreets. Keep to her instructions and you shouldn't have to drive through the narrow streets at all.
I really liked Agrigento, the centre is historic and pretty and it had some of the best restaurants we'd eaten in and the people are friendly and kind.