1. The leather does wear and gets stained along the edges where you usually hold, but it also adds that unique character.
2. Depends on how you use.
3. This is one of the best cases in terms of the overall feel, doesn't feel cheap plastic or bulky or cold.
... having said that I would have preferred if the case was made with a more durable leather. It gets stained pretty quickly. On the black case, it may not be noticeable.