I was a bit disappointed by this episode.
While Andrea has never been my favourite character, I thought that her death at the hands of zombie Milton was out of character. If nothing else, Andrea had generally been shown (at least recently) to be an effective zombie killer. While she may have been weak and possibly injured as a result of being the Governor's prisoner, I still find it hard to believe that she wasn't able to prevent herself from being bitten.
And the fact that Andrea decided to engage in chit-chat with Milton instead of solely focusing on picking up the pliers/wire cutters was very frustrating. Given Andrea's experience with watching the animation process, I highly doubt that she would choose to have a heart-to-heart with Milton instead of concentrating on picking up those pliers (or trying to remove the arms from the chair).
It was also disappointing that Andrea never had a chance to evolve into someone a little closer to her comic book counterpart.
The Governor's attack was also disappointing. I can kind of understand why the vast majority of the Governor's people ran - they're not soldiers. But, why did the Governor and his men retreat? They had some kind of rocket launcher! Surely that would have taken out Maggie and Glenn who appeared to be the only ones firing on the Governor (even though Michonne, Rick, Daryl and Carol were somewhere in the prison, presumably setting off the flares and the alarms). And Rick's plan seemed odd as well. Wouldn't it have made more sense to lock the Governor and his "army" in the tombs with the zombies? Shoot out the tyres on their vehicles so that they couldn't escape? I guess my main disappointment is due to the fact that the Governor will return. I have no further interest in his character and I don't want to see any more episodes with everyone in the prison sitting around wondering when they're going to be attacked by the Governor.
I'm also a little disappointed by Rick's decision making. He ignores someone on the side of the road when visiting his home town, but decides to recruit a bus full of old people and children? I sure hope that bus was also full of all the food, medicine, water and weapons from Woodbury as well as the bunch of mouths to feed. I understand that his character is meant to be developing from a softie to a bad ass and back to a softie again, especially given Carl's character development, but it still seems a little odd.
I do hope that season four isn't another season of prison vs. Governor.
P.S. I forgot to mention that I had no issue with Carl's actions. Hershel and Carl both told the teenager to DROP his gun. Instead of dropping it, he held onto it and slowly kept moving toward Carl. To me, it seemed as though the teenager's actions could have easily been interpreted as an attempt to attack Carl (i.e. knock the gun from his hand) and then kill Hershel. Hershel's "warning" to Rick seemed out of place to me. Especially when Carl had the sole responsibility of protecting the one-legged old man, the untrained young girl and his baby sister.