Same as everyone else here, I couldn't be more pleased with the leather. In fact, I bought the gray and then a few drops later came back for the brown!
Also (again, same as the others) the paper was 86'd with the quickness and right now I'm using two Midori A5 grid paper refills (affixed together with double sided tape) as a single journal. I'm still on the hunt for my "perfect paper" but for now, that works.
As mentioned in one of these Manufactus drops, if there are any concerns about writing on the fasteners, you can always just write on one side and when you reach the end, turn and flip the journal over and write on the other. I've written on both sides with minimal interference from the fasteners, however I like this turn n' flip method and am using that currently.