We only spent a few days at Daniela's place but they were very enjoyable. First - as everyone pointed out, the apartment is quite big with a huge master bedroom. The second room where our 6&4 year old daughters slept was very homey & full of children's books - they loved it.
While we didn't spend too much time in Trapetto itself - we still very much enjoyed the "time travel" experience into the old and 'true' Sicilia, quiet, people chatting in the street and mobile grocery shops selling their produce, moving from one place to another. Very different from city life and even most small towns.
We didn't meet Daniela herself but her parents which welcomed us were lovely. They explained us about the surroundings - in pure Italian, but we managed to communicate still :) Our daughters pretty much fell in love with her mom and couldn't wait each morning to go down and "Ciao" her in the morning.
Trappeto is an great 'base' for visiting north-western and central Sicily - we visited Trapani, Erice, Alcamo and of course Palermo - all easily reachable. In addition, there are nice beaches both in Trappeto and in the nearby towns.