Stayed for a week, solo travel, some excellent staff at reception, some not so good, that could have been because i don’t speak Bulgarian, room is adequate for single travellers, warm and WiFi good, only negative was room or bins weren’t cleaned or emptied for the whole week.
It’s about 20 min walk to main attractions but there are trams every 10 min at top of road, you can just use your debit card to travel, tbh the public transport is excellent in Bulgaria, used the Metro to and from Airport again just swipe your card.