We unfortunately only spent one of three nights that we had planned at this apartment. We found two live cockroaches in the bathroom, and then a dead bug in the bed which strongly resembled photos of bedbugs. (We also both had bites after our stay). While bedbugs can happen anywhere, it was very concerning to me that the host did not take the situation seriously. He claimed the bug was a baby cockroach, and offered no type of solution for either type of bug.
The apartment was in a great location, on a quiet street, and Rio was quick to answer our messages. If he deals with the bug issues, this would be a nice apartment to stay in. Unfortunately, that is the best review I can give.
(It should be noted that Rio gave a full refund for the two nights which we did not stay (but not for the first night). However, we lost a half day of our vacation in Athens, spent at the laundromat washing our things.)