Both parts of the zip fell off when I tried to open the bag, only one month after purchasing it new. The zip was sealed shut, so I was forced to tear the fabric to retrieve the contents.
My 15" macbook was not suited to this bag. The weight and size of it put stress on the bag and contributed, I'm sure, to the broken zip/death of the bag. Not a bad bag if it had lasted, as spatially it's decent. Just a cheap zipper.