GOOD: The breakfasts were very good, the room was cleaned and provided with fresh towels and bed daily. Balconies are equipped with little tables/chairs - enough to sit 2-3 people comfortably. There are only 16 rooms, it's very quiet, clean, design of the rooms, bathrooms and public areas is pleasing the eye, there is elevator. Laundry was done pretty well (though I suspect one of my socks got lost).
NOT GOOD: They forgot to register our booking from website and it's good that I've called to reconfirm it a week before the visit, - still because of that we had to switch the room to a smaller one for last two nights. In one room TV made a background noise when on. In another one the bathroom fan did. TV - mostly Serbian, very few international channels. Refrigerators were so tiny we had to remove the "minibar" drinks from them to fit our food in. WiFi kept disappearing from time to time.
OVERALL: Despite of the little issues I described above the overall experience was pretty good, the stuff was friendly and helpful, considering the pricing it was a great value, I'd definitely recommend it as a budget option.