I used this apartment as a home base while I stayed in Greece for a month, & it more than met my needs and expectations.
While there I worked remote for a portion of that time. The wifi was great and I was able to work without any issues. There is desk for working, or you can work on the patio outside, which I did. The patio is covered so you won't get burnt, or too overheated from direct sunlight.
The neighbourhood is in a great location & has a lot of food and shopping options, which I took full advantage of. If you want to walk and explore other neighbourhoods, it is walking distance to many of them, as well as many historical sites.
If you're looking to get around Athens & the surrounding area, this apartment is less than a 10-minute walk to the nearest metro station, so you can easily facilitate a day/few days trip if you want to go to the islands, or the zoo, or somewhere else that is metro (and ferry) accessible.
If you are staying long term like me you can arrange with John to have a cleaning service come in, the rates are very reasonable & they do a great job.
John himself was an excellent host & provided recommendations for restaurants & nearby services. He was also very understanding and made sure to check in a few times to make sure I had everything I needed.