Rossana really looked after us! The flat is spacious, clean and had a great view over a field opposite. The bus stop to the Metro is very close. 1.50euros for unlimited buses and 1x trip on the Metro in a 100min period. The supermarket is a 5-10min walk up to the junction at the top of the road. Taxi from Ciampino Airport should be 20-25euros. The Restaurant you can see from the balcony is great! 2x starters, 2x pizza, bottle of wine, bottle water and soft drinks (3 adults and 1 child) came to 44euros.
Hope this helps - it's a great place to stay!