We were four people staying at Daniela's place in Marsala. The apartment is very suitable for a group of this size, and it's very clean and nicely furnished. Also, it is very close to both the sea and the city center (also, a small supermarket is just around the corner).
Daniela is a very friendly host, and communication with her was fast and easy! Plus, she was very flexible when our check-in time differed substantially from what we arranged before ;)
If you want to stay in Marsala (a good base for doing kitesurfing in the area), Daniela's apartment is a very solid choice!