I can recommend this venue highly
1. It was spotlessly clean.
2. It is spacious for 1 or 2 people.
3. The location whilst in the inner city is quiet.
4. It is fully equipped with everything you may need. including a washing machine.
5. The building security seemed very good.
6. Having access to the balcony was very nice.
7. the bed was very comfortable.
8. It is relatively close to the Gazi restaurant area
The only two areas for improvement in my view were
1. Check in is needlessly complicated you only get the number to the lock box when you arrive in Athens, The Air BnB app was not installed on my new phone so this caused issues
2. It is about a 25 min walk from the main tourist attractions but then taxis can solve this.