The zipper can join pleasant and without scratching and the bag is slim and looks good.
For protection of the bag:
I think that this bag offers good protection. It is thicker than Neoprene Sleeves and Shockproof Pouch System should be able to intercept light shocks determined. Against stronger shocks from sharp objects can not possibly protect, but that could probably generally only a hardcase.
I am satisfied, have not seen a better bag for the MacBook Pro Retina.