Big fan of the Walking Dead here.
It looks awful. You see the same walker multiple times throughout missions. Sometimes the same walker attacks you simultaneously. Environments are unremarkable.
Very linear with some ability to explore and do side missions.
You can't kill indiscriminately which angered me. If I want to kill a cop for his gun I should be allowed to do so.
I still enjoyed it because the voice acting and music. Executions are cool but I wish they were more varied. I think as I progress the weapons will improve. I'm about two hours in. If you explore and gather supplies you can stretch it out.
There were times I got scared. Bumping a car, setting an alarm off and getting swarmed.
My advice, if you're a fan of the show pick it up. If you're a COD fan pass.