We will be in Athens for 3 days in October and would like to find a good walking guide to get us around the city. Has anyone used one?
I took a group of students and teachers to Greece and we used the Free Walking Tours group and had a wonderful time. Our guide was knowledgable and very accommodating. It's recommended that you tip 5 euro per person which for our group would have been 35 euro. We enjoyed the tour so much that we gave him 50 euro. Since we had already been to the Acropolis, he customized the tour and only took us to the sites we had not seen.
The Global Greeter network now has an Athens "branch":
FWIW, we have used them in Paris and Munich and enjoyed both tours (and the price is right!). BTW, they discourage tips but do accept donations through their web site (which are completely voluntary and do not affect your ability to schedule a tour).
There are 3 recommended in RS Athens Guide Book.