We stayed in La Rotonda for a week in Septmeber 2017 and honestly can't recommend it enough.
Fabio, the owner of the flat, went above and beyond to make our stay perfect. He was very quick to reply to the email I've send prior to the arrival and made sure we had all we needed when we've arrived.
The flat is spacious and very comfortable. It's equipped with all you can possibly need: super comfy double bed, an even comfier couch, round table with 4 chairs in the dinner area, a stove, dishes and cutlery, hairdryer, towels and more. I loved little stylish touches such as a massive standing mirror in the bedroom, designer light bulbs, plants and the wooden figurine in the hallway.
The bathroom is great - there is a very modern standing shower with different options (rain shower, hand shower, etc), a bidet and an additional lighting above the mirror (loved this detail).
The balcony stretches along the whole flat, we loved having our breakfasts and evening glass of wine there. Wooden balcony floor made it great to walk barefoot.
And you can't beat the location. One of the central yet quiet streets, right next to the wonderful view point over Ragusa Ibla (the old town). The supermarket is just 3 blocks down, and you can walk to the main square in less than 5 minutes.
We've had a wonderful stay in La Rotonda. Highly recommend!