I am yet to have a vada pav that would blow me away. They taste good, but when I bite into one I always have a friend whispering this to me 'oh this vada pav is nothing ! you should taste the ones they serve in <insert location>'.
"Joshi Wadewale" is history now..it was the best when we were in school in 90s.
Now recently I enjoyed good wadapavs at various places -
1) There is one sold outside Subway in Aundh, Pune.
2) Reddy Wadapav near VishrantWadi Airport road.
3) One on Karve road outside Tech Mahindra office. I havent tasted for last 4 years though after I left TechM.
Above all the one that my wife makes at house have the best taste . Whilst in US, I had taken around 40 wadapavs(homemade) to the office for International food day and ppl ate 2 to 3 at once.