From what I recall, the nylon on the inside of the Black Bowery backpack was this beautiful pink, which was thin, light and soft. On the outside, however, the black nylon was thicker, shinier.... it felt a cheap to me.... yes the finishes of the stitching were not great on the sample I got. For me, the stitching was a dealbreaker. I returned with Post-It notes all around pointing the places where the stitching was faulty. I hope my feedback will serve to improve quality. On a contrary note, I have read good reviews on the printed versions of the Bowery Backpack though.
I own a few Old Bedford nylon pieces, where the nylon is top notch and the stitching finish is perfect. The old school pieces were put together like couture.