What stood out most were the great sets. It looked pretty impressive.
It became clear to me that most of the focus on seems to be on how things look (the walking dead). The characters should at least respond to their scent. No one would be able to be in a room with a rotting corpse in it without covering your nose. Because the stench is unbearable.. But in the show people are only shocked by the appearance of the zombies (for example the disappeared bits of skin). They can't smell them.
This is quite a shame, because the creators are really doing their best to make the story credible.