This property is beautiful. Facilities are superb ... bathrooms, kitchen, living room. Location along front road with windows facing waterfront is wonderful. You get to hear the sound of boats rocking in the waves at night. Very relaxing.
Teodora (manager) is not on location but is available by SMS/texting, so its helpful to have a phone (Traveler SIM cards are 80-85 KN for one week unlimited data, so very cheap!). However, she is VERY responsive by SMS/texting and will answer all your questions.
If you bring a car, parking is tough since there is only the spots in front of the unit and they are often full. We were fortunate to find spaces available when we needed them. Otherwise, you must park a 5 minute walk away for a small fee. This is still a lot easier than many cities in Croatia.
If you have no car then you will have to roll your suitcase to the end of the waterfront. But if you are traveling throughout Croatia, then you will soon learn that this is the normal for every waterfront city, so nothing unusual here.
Sibenik is a small town place which we thoroughly enjoyed and would have like to stay longer. We had 3 nights here and could have stayed a couple more easily.
My recommendation is to stop looking right now and book this.