We stayed 2(!) weeks at Le Specchie with our kids (22, 19). Nice and quiet place from where you can visit the many fine towns in the neighborhood. Le Specchie has a very nice pool, fine breakfast and much better beds than many hotels!
Some nights the organize a dinner for the guests, join! (great cook!).
Nice place if you like a quiet place. If take your kid of this age they should be able to drive a car or like the quietness.