We stayed four weeks at San Virgilio and our experience was generally positive.
The owners are kind and friendly; the house is nested in the spectacular "Piana degli ulivi monumentali", in a perfect location to enjoy the calm of the countryside while being only 5 minutes drive from seaside, restaurants...
We loved the large bedroom with typical star vault, and the cozy intimate courtyard.
The thick house walls keep the apartment fresh enough, although airco is available, should one need it. The size is perfect for a couple.
To be improved: wifi signal is so-and-so, partly due to the fact that the stay is in a rural area, partly because the router is located in the apartment at the upper floor, the bandwidth being shared with its tenants. This was a problem during our stay, since we had to do teleworking. Besides, we did not really use the kitchen electric stoves (they take too long to heat up).
The owners said they are willing to address both issues in the future, so this might not apply to future renters.
As it is, we can definitely recommend San Virgilio for a short stay in a quiet beautiful location. Yet, some improvements are needed to match the needs of long-stay guests.