Anna and Efi's place is the PERFECT location for exploring Athens. Walking distance to EVERYTHING. Dining , shoppping, sight seeing and transportion at the doorstep.
The Monastiraki Metro Station is literarlly out the front door and down the escalator. Great food and lots of it less than a block away. THe view is SPECTACULAR. You will be hard pressed to not have every breakfast and dinner or at least an evening glass of wine on the balcony. We had an amazing time in Athens. Three days at Anna and Efi's and we can't wait to go back.
You should also know that their response time is almost immediate and they are very helpful as far as arranging for a driver for pick up and drop off and they give you a very thorough list of information regarding Athens.
I highly recommend Anna and Efi's place if you are staying in Athens. It is amazing.