I booked a studio for parents and adult daughter, I saw that reviews were mostly positive with some criticism of the breakfast and swimming pool. The price was so good that I wasn't sure what to expect, but the hotel was great! The studio turned out to be two connecting good-sized double rooms, well appointed, comfortable and warm. Breakfast had plenty of choice of hot and cold food, some items quite different to what I'm used to but easy to find things I liked. The swimming pool was pretty big for a hotel, and we always had it to ourselves. (Several others on hotels.com that appear to have a pool are actually offering use of one somewhere else, check reviews before booking: pool at the Sadova is within the hotel).
Heating in the room is by an air circulation system, which I normally don't like, but this one worked well and was very quiet. There's also a normal radiator in the room and very effective double glazed windows so room should always be warm enough.
The mattresses were quite firm which doesn't bother me but might some people.
Couple of minutes from tram stop and about 8 minutes walk from the marina area, we went for the Christmas market and it was ideal