I enjoyed the central location near Syntagma square, the bed and linens, and the office vibe (e.g., lots of bookcase and books, and a nice desk table). It somewhat reminded me of my dorm room in grad school. Basic but functional. And the WiFi was great!
Unfortunately, the air conditioner was leaking during my stay, and this lead to a dripping noise night and day. It was not repaired, and I did not receive any sort of allowance for this. I was just told that most Athenians go on vacation in mid to late August, so it wasn't going to be fixed during my stay.
The listing mentioned including breakfast, and this apparently meant a few snack items in the fridge and on the table (e.g., grapes, bread/toasts, and a terrific cherry marmalade). Personally, I think it's a stretch to say breakfast was included. Other hosts provide more than this just as welcome snacks. There was a TV, but the size and station selection was very minimal. And like one of the previous reviewers mentioned, there is an unusual scent, perhaps due to its apparent history as a medical office.
For the price, labeling it a cute place in Kolonaki is an apt description. I would describe it this way too. If I didn't have to deal with the air conditioning issue, I would have probably considered staying there again.