Robert's place is a great choice when central location is key to your wish list. We were close to restaurants and touristic places, but also well connected to go to places like Glyfada if you fancy the beach.
Clean, quiet, just right for a couple of days. Robert was really fast in answering to our messages.
The only aspect that needs to improve it's speed of the wifi connection. We needed to work in the morning and evening and had to use the Hotspot. The wifi speed never went above 9mb/s, while on mobile data we had around 200mb/s.