I stayed in Federica's apartment with a few friends and we loved it. It is in the very city center, one street away from the street Garibaldi, the main street, and just a few streets away from the port, from where one can get transportation to Egadi islands or San Vito lo Capo (the Trapani town beaches are not so great). The apartment itself is very nice - it is very spacious, which makes it perfect for a large group of friends, it's also very well equipped, and it has water reserves, which means that we didn't feel any of the water lack problems that are common in Trapani. And Federica and her dad were lovely hosts - they were both very helpful, and her dad even surprised us one morning with Sicilian bakeries! :) So if you are staying in Trapani, I definitely recommend this place.