"Daybreakers" is based on an interesting premise that mixes the original fantasy elements of the classic vampire stories with a futuristic sci-fi setting and a curious "What if?..." basic story idea.
It's neatly executed, and beautifully shot and lit. As you might expect from a modern vampire story there's plenty of blood and guts, but generally there are only a few excessively over-the-top moments, and at times it borders on being comic- especially the way in which vampires explode so melodramatically if stabbed through the heart.
After a strong start, the story deteriorates slightly into a predictable hunter-and-chased movie in the middle, but it wraps up nicely (no spoilers). Not destined to be a classic, but a very accomplished and worth-watching movie for sure.
The Blu-ray has all the usual features you'd expect- full director commentary, behind-the-scenes making ofs, trailers, all the usual BD interactive standards that you'd expect, meaning it's well stocked for extras without adding anything too unusual.