The factual errors in this movie are to numerous to mention - a few webpages have tried counting them all, and I think there are more than 100 major errors in this movie. A lot of the characters are portrayed quite differently from how they actually where, some of the chronology is all wrong, a lot of central evidence has been withheld, some evidence has even been made up, etc.
There is nothing "well balanced" about this, if you're looking for a portrayal of the actual events that took place. Most of this movie is based on a book by Stephen Knight - or one of his fans - a book which has been denounced as totally incorrect and factless by ALL serious Ripper researchers.
Still a great movie, though - can't give it more than 7/10 however, as it claims to be a true story - which it most certainly is not!