I kinda liked this episode, but like many others lately, it was missing that something which made previous episodes better, mostly the first season.
Not "shocking" like a zombie suddenly jumping in your face out of dark, but that chilling dread you get from those doors with "DONT DEAD OPEN INSIDE" written on them, or when Rick looked behind the doors in the hospital and there was that half-eaten body just laying there. That's what I like, a scene where things are fucked up and you can only wonder about what the hell could have happened there.
I loved the Fallout 1-esque intro though