Dario is the perfect host, going to great lengths to ensure we had all we needed but without being intrusive. He was always on hand in case of problems, like a faulty suitcase lock! The pool is a good size, nice and clean and a good depth. The area around the villa is very nicely kept with flowers, herbs and even tomatoes. The BBQ is large and well equipped. The villa is peaceful with good views of the countryside- your only neighbours are locals and cats! The kitchen is also well equipped and we were lucky to have freshly baked treats provided by Dario's mother. You will be happy in the villa and by the pool all day if you want. There are also some lovely walks to the Cetina river where you can swim in cool and beautifully clear water. If you want to explore further you will need to hire a car. If google maps don't take you to Villa Katja, we found Srijane 160A got us right there!
As for places to visit, we liked Trogir, followed by Sibenik for the best towns. For a countryside tour, you won't beat finding the source of the Cetina river at Cetina, just southeast of Knin (don't get confused with the other Cetina, near the villa as this is the sign for the river!). Mostar is an easy cultural trip but it has quite a different 'feel' to Croatia.
In short, we thoroughly recommend Villa Katja for a restful holiday and wish you a wonderful stay.