In Gabriele's place, everything was perfect. We had the whole apartment (4 beds) to ourselves. It was quiet and clean. Especially remarkable is the amazing view onto the mountains on the back of the house and the sea in front of the house. If you have a car you can reach lots of good places (e.g. Riserva Naturale Zingaro, Palermo, Erice, ...) and Castellamare itself has some nice restaurants and a touristic beach.
Gabriele and his family were very friendly and welcomed us nicely.
One star minus for the location but just because it is very narrow to get to the house, so make sure when you rent a car that it's not a too big one (Gabriele also told us that, so we knew what we were getting ourselves into ;-)).
Thanks for everything!