We stayed here (apartment il chiostro) for six nights with two kids. The amenities inside the apartment are very basic, small inconvenient kitchen; old smelly bathroom; noisy bed. Fortunately most of the day we could spend outside at the pool (really nice also for young kids) where one had one of the most spectacular views over the Tuscan hills.
Moreover it is close ,10 minutes by car, to beautiful Florence or Fiesole. The shop on site is handy, as is the restaurant (average). Their olive oil s great!