The place has everything that a solo travel may need. It's located in a close proximity to various places one may want to visit in Athens.
The staff is super helpful and always willing to help with an advice, so you definitely won't feel lost :)
The only downside is the district itself (Omonia), which at various parts oof the day/night, may not feel like the safest place on the Earth. However I didn't have any incidents there, so maybe that's just my incorrect/wrong impression.