We stayed in this hotel for two nights and enjoyed our stay. We were given a (very!) large room that was very well equipped, clean and comfortable. The location was very good - we could easily walk to the sights and shopping/restaurant areas of central Sofia. WIFI was fast and reliable.
The only disappointment was the breakfast - it finished at 10am sharp and the staff were a bit slow to replenish the items as they starting running low from 9.30am and not very friendly; the eggs were not freshly cooked but just sitting in metal dishes.