Wow!
One word!
It is a beautiful oasis - on a remote hillside on the very edge of town, in keeping with Matera's cave-like dwellings. Perfectly appointed; large bedrooms (we had a suite near the pool area); which looked brand new, and were spotlessly clean. Mini-bar (but had to pay for anything); coffee machine (two free pods a day); walk-in rain shower; flat-screen TV with lots of channels. Even a weird separate smoking "room" at the rear of each room.
The pool area is even more beautiful - well proportioned sunbathing beds, umbrellas, free towels... and a wonderful infinity pool over-looking the amazing hillside opposite. Just gorgeous. Quiet and peaceful and romantic. We were out-of-season (September), so there were only half a dozen other couples there... but there aren't that many bedrooms, so would hope would be the same at peak times.
Gardens are equally amazing, as you walk up to reception and breakfast.
Breakfast was a little disappointing. In an amazing cave room, but the choice limited. Orange juice had run out by 9.30am (with no more); bread limited (no croissants); nice ham, but only tiny slices of cheese; some OK cold pizza; no fruit (apart for some grapes); loads and loads of cakes (nice, but a little odd that this was the focus); great coffee freshly made; and a huge honey comb. It felt very much Five Star, but lacked the delivery - perhaps better at peak season.
Worth pointing out it is out of town, and not an easy walk in.