That's cool to see, because my experience has been that the zippers on my several BA tents are the achilles heel for each item. I have never spent so much care and time on a product zipper as I have on those in my Big Agnes tents. Come to think of it, my sleeping bag is finicky-zipped, too.
Now, will a series of button mags seal that door from bugs and such? I'd like to fondle it in the store and see some field reports, of course.