I really liked this show when I watched the original broadcast in HD, but this is a review of the actual product (which I received today), not the series itself.
It comes in a thick plastic case which might be used for four discs, but there are only two discs. How do they fit 13 episodes on only two single-sided discs? First, they replace the 5.1 channel high fidelity soundtrack with two-channel stereo. Then they compress the video a lot more, and it shows, more or less. It actually looks better than I thought it would, but compression artifacts are obvious in the details, such as the weave of his shirt, or the color banding in the sky of a rising sun. All the commentaries seem to be here, however, sometimes two per episode, and there are three video features as well, probably from the original DVD release.
For reasons unknown, the discs are in two loose paper sleeves. It may be that the distributor intends to save money by using the same thick plastic box for all their releases requiring more or less discs (and sleeves).
The ideal Daybreak on DVD would be on Blu-ray, so that I could see a version that looks at least as good as the original broadcast. Second best would be the previous four-disc release. Last of all is this two-disc set, though it's still worth watching if you haven't seen the show yet.