As requested by Jana, an update to my grapple story. How did it taste? Well, it was really sweet, but it wasn't as crispy as an apple. My kids didn't like them. It was okay, but not great.
I did look up their website, too! Apparently, they use an FDA approved process of bathing the apples in a mix of concentrated grape flavor and pure water.
So we tried our grapples, just to say we did. I think I will stick with apples and grapes.