I don't like any "extras" in my Bible. It's not like a Director's Cut of 'Big Mama's House' or something. The folks who put together the KJV didn't do it overnight or haphazardly. It was made to stand the test of time. The other books are not authorized and often come from a totally different time periods that are far removed from accepted scriptural cannon. I won't bother to go into details here, but it's easy enough to look into it for yourselves if you choose to do so. The short answer is stick to the KJV and you won't go wrong--use other translations at your own peril--and by peril I mean
better safe than sorry!