It took an episode or two to get into the first season of Victoria, but once in it captures you. Its great to help you swat up on your history a little bit. It also helps you to look through the young eyes of Queen Victoria and gives you a decent idea of what she is like (even though some of it may be sugar coated!).
If you enjoyed The Crown about Elizabeth II then you will like this. Its not quite so polished and in places it can seem a bit romanticized and in others a tad depressing/slow and predictable. But having gone into this not expecting much (I dont tend to like ITV productions all that much) I was very pleasently surprised at how close to the known historical facts it is, of the strength of a lot of the acting, and how it kept my interest - wel done ITV.