We had an excellent tour with Cindy and Mike on a Sunday morning in autumn. The timing of the tour is perfect as you get to experience Central Park without the throngs of tourists and hawkers. The tour itself is filled with interesting details about the park's design and construction and the yoga element adds a unique spin to the experience. All in all, it is an easy, accessible and fun way to explore one of New York's gems.
I would suggest doing the tour at the start of your trip to NYC - it will make every visit to Central Park after that even better. Thanks again to Mike and Cindy for going out of their way to make it a great tour for us.