I watch it, it's great. I get really REALLY easily grossed out though, and I have a terrible fear of severed heads. Being a zombie programme, yes it's pretty gory, and lots of chopping-off of heads, but they're reasonably easy to anticipate so I just shut my eyes and DH tells me when I can open them again lol.
The plot is great though - much more about the people rather than the zombies, if you know what I mean. The zombies are almost like a prop, but the drama between the people is the real plot.