We loved staying at Kleio's - great place in a super location and brilliantly equipped for everything we needed. It really does feel incredibly relaxing as a space and is lovely to kick back in after a long day sightseeing. The neighbourhood is great - near all the ancient historic sights but also very peaceful and not touristy, in spite of how central it is. Kleio was so warm and friendly and gave us some super local recommendations as well as helping us to arrange transportation both to and from Athens.