I thought this was a really fun movie and a great premise. The entire movie is taken from one chapter of Bram Stoker's novel. And this was the perfect chapter to adapt because it didn't have much detail and none of the other characters from the book appear in it (and none of the characters in the chapter appear elsewhere in the book). In the chapter, Dracula's coffin travels by boat to London. When it arrives, everyone on the boat is dead. That's the entire chapter. So it gave the filmmakers a lot of room to work with.
I remember seeing an interview with the director where he compared it to the movie Alien, which had a crew trapped aboard a spaceship being slowly hunted by the alien. He wanted to make a similar movie but with the crew trapped aboard a ship being slowly hunted by Dracula. And I think it worked beautifully.
I have one nit-pick about the movie and it's in the final scene. I'm going to try using spoiler tags, although I don't think it really "spoils" the movie. It is the final scene though so I'll play it safe.
spoiler
At the end of the movie, there's one survivor. Given that this is a movie and the audience would want to see somebody survive, I don't think it's a bad choice. But I would've preferred if this one survivor either went crazy and was locked into an asylum or went to live as a hermit in the forest. That is, he should've exited the story. This would've allowed for the rest of the Dracula novel to take place uninterrupted.
Instead, the movie ends with this final survivor in a pub in London tracking down Dracula and vowing revenge. And that... kinda ignores the fact that this is only a single chapter in the Dracula novel. Nothing else in the movie explicitly disregards the source material. Yet having the sole survivor alive, in London, and actively tracking Dracula when his character doesn't show up again in the rest of the novel means they're either breaking away from the novel's story or this character was so inept that his attempt for vengeance had literally no effect on the characters who actually defeated Dracula in the novel. It's a weird choice and I think it ends the movie on a bad note.
Anyway, here's a trailer. I think you should definitely watch it if you get a chance.