It's mostly for Anglicans and other Protestants. It can be used technically by Catholic's, but all of my previous Church's told me specifically not to, because as a Catholic, I should be using the Vulgate, or a Catholic edition if I want a Bible I can actually read without learning Latin. I mostly joking about the sin thing, but it was usually frowned upon by the Church's I attended (and my schools, which were also all Catholic).

I do actually have the Vulgate, I just don't use it because, you know, latin and stuff.