Spent 3 weeks at Columba's place in November doing a writing retreat. The place was perfect for me since I wanted a relaxing environment in nature. The house itself is very solidly built and comfortable. The large covered terrace is the highlight, as it faces directly south out to the Adriatic (actually I think the Bay of Manfredonia, but definitely ocean). There is a beach at the bottom of cliffs about 800 meters away, but access is through private property that operates a concession, and seems to be mostly a summer thing.
Kitchen is well equipped (but you need to bring your own spices outside of pepper and salt) and if you need to shop there are stores less than 10 minutes away through the tunnel in Mattinata. You can't walk or ride a bike through the tunnel, so if you do need to shop best to have a car. For me, Tratto in Mattinata was quite good for food basics, personal care, wine and spirits, and do on. Open early til late 6 days a week with the normal break from 13:00 to 16:30. Tratto however has very limited fruits and vegetables as those are available directly across the street from the Tratto parking lot in a small but well-stacked shop.