If you want to stay in Exarcheia I would say this is a great place to stay. I can only say great things about our hosts Nektaria and her friend Rosa. They picked us up at night at the bus station and even let us stay longer than the usual check out time because we had a night flight. It is an old building but Nektaria has turned it into a very cosy place with tons of personality. There is not much light in the kitchen/bathroom but the room makes up for it with a big door that leads to an amazing patio that is the ideal place to chill out late at night.
The house is fully equipped with everything you need in the bathroom and a fully equipped kitchen… and lots of toasts, teas, coffee and what-not.
Some people complain about the area but if you want to stay in Exarcheia you probably know what you are getting yourself into. The area does seem a bit more tense now compared to the other times I’ve been there but it’s still a bubble of resistance, a cultural hub and a paradise for vegans and non-vegans with dozens of great places to eat.