I personally think the show is highly underrated. The show itself is not a masterpiece, the Passionella act stands out as particularly weak and the one in which Chenoweth doesn't fare as well. The production values do have a sense of summer stock.
Having said that, I thought the performances were first-rate and do wonders with the material. The Apple Tree is a vehicle for the female lead and Chenoweth does amazing work in here, her Eve is hilarous, strong-minded, and ultimately touching (She's at her strongest during "What Makes Me Love Him"). Her Barbara is also incredibly funny and I particularly love the physical comedy during "I Got What You Want." D'Arcy James gives a great performance as well and Marc Kudisch is of course his brilliant-self. I don't get all the negative comments against Chenoweth and this production, I had a great time.
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"