For your information, I spent 2 months in this appartment.
Location: You are located on the main street of the city. That comes with pros and cons. (Pros) You get to be in the center of the action. You are 5 minutes away to most stores and restaurants. On your balcony, you have a great view of the street and the locals shopping. It is a pedestrian street so you can expect very few cars. If you walk a little, you can get to a park with a great view of the coast and the sea. It is my favorite spot. (Cons) Being on the main street also means more people and more noise. It is only noticeable on the weekend during the night because you can hear the music. But it should not bother you if you decide to go out at that time to hang out with them.
Service: I always got a response within an hour or so. Trust me, the hosts are there for you.
The place : The appartment itself is great. Clean, great art on the walls, functional. Agrigento is known to have water issues. Personally, I never had any while I was there. The hosts added tanks to make sure we always have water.