Jj's place is very beautiful and huge. It has 3 bedrooms and a huge 4 part living room. It is quite an experience to be in such a historical place, with all the vintage furniture, dishes, etc., and the very heart of Plaka. It has a view of the Acropolis, and the bedroom that has this view, which is also huge and beautifully furnished, is one of the most gorgeous rooms I've ever seen. The location is great, and we were able to walk around Athens without using public transportation: to the Acropolis, Monastiraki, Syntagma (also for the x95 bus to the airport), which was great. It worked well for us (a family of 5) and could easily work for a family or group or 6 or even 7. Checkin and checkout at the next door Dioniskorous hostel was very convenient. There was tea and coffee in the apartment.
A few issues we had / warnings:
1. The place is a bit dusty. If you suffer from Asthma this is not the place for you.
2. The apartment is above the outdoor lounge of the next door hostel. Out of the two nights we spent there, one night was quiet, but in the other night a group from the hostel made a lot of noise. It did, however, stop by 23:30.
3. The taxi service they offer to/from the airport / port is overpriced.
4. One toilet was not working (couldn't flush the water) and smelled bed. There was no warning about this.
5. The double bedroom was not provided with a blanket and we had to look for one.
Over all: a beautiful , unique and well located place with some issues to be taken into consideration.