On their homepage, they describe the hotel as a luxury 4-star property, but I would consider that an exaggeration.
I wasn't fond of the glass wall in the bathroom—unless you're very comfortable with your travel companion, it might be a bit awkward. That said, the hotel is functional, boasts a great location, and the staff was friendly. It’s a quiet neighborhood, and we were able to sleep with the window open without any issues with noise. The street itself is a typical, grey, and rather uninspiring Eastern European thoroughfare. The hotel is in walking distance to most of Belgrade city center.
The breakfast options were somewhat limited and lacked healthy choices and my boyfriend really missed a good cup of coffee.
The spa was decent (we had it included in the price). It’s private, meaning you have the space to yourself during your booked timeslot.
Overall a nice stay and if I come back to Belgrade, I would consider staying there again.