I've studied in Varanasi for four years, yet when I went back in February and took this tour with another college batchmate and other friends, we covered aspects of history, mythology, culture and food of Varanasi that I had never seen before. And it was exceptional!
The walk was was perfect in all aspects - there was depth and width in the topics we spoke about (Varanasi's connection with Shiva, the laidback life, the significance of the river, local myths and folklore, life and death); we had food at a lot of places, all of which were carefully selected among the best in Varanasi, but we were not 'full' till the very end. Ayush was incredibly patient with us - we kept stopping at any place we really liked, and so a 3-4 hour walk ended up lasting over 6 hours.
I recently also did the Old Delhi walk with Roobaroo, and it is just as good. Roobaroo is now my favourite way to enjoy any city, and I look forward to the next one!
Highly recommend this walk.