The book was terrible, it was just a hokey chase story with the vampire mythos plugged in, it was the first to popularize ancient legends using a semi decent plot format.
Actually it was a story about parallels. Old Europe vs New Europe. Technology vs Mysticism. Science vs Superstition. Purity vs Sin. Faith vs Doubt. Feminism vs Female Oppression. Good vs Evil. The Enlightenment vs The Dark Ages. Love vs Lust. Death vs Life. The chase was only at the end of the book. And it was to point out what a truly cowardly being Dracula really was, once you aren't scared of him any more.
The movie is much better and more enjoyable. Its fantasy so the vlad the impaler ethics is not important in this context.
Considering he was more or less presented as BEING Vlad The Impaler in the film, I'd say it is.
Secondly the move to complicate him was a good idea, one thing I strongly dislike in films is one sidedness and obviousness, I prefer shades of subtetly and character development, bending conventions rather than adhering to them. The film is a bit lumpen but then given the source material that was somewhat inevitable.
I still fail to see how a character who is supposed to represent The Bubonic Plague could be sympathetic. I mean, the guy's a mass murdering, baby killing, rapist. Not exactly the guy you want to have a beer with.
It is the definative dracula movie and I don't see it being bettered as its interpretation of the source material is successfully realized and its uniqueness excludes the possibility of it being superceeded, it can only be rivalled with alternate versions.
It's probably the most popular currently. Mostly because of the sex. And chicks dig evil guys with a heart of gold.