Well, it was an exhausting episode, in a good way. And it was nice for Herschel to get the limelight. But it's difficult to get past the contrived disasters of the infection and the fences being overrun.
The infection is a cheap way of getting zombies inside the prison, but it would be forgivable if it wasn't so plainly inconsistent. I just feel like they've wasted an opportunity by killing off all the Woodbury residents when they could've explored the community aspect more and made us start to actually care about some of them, instead of using them as impactless fodder.
And the fence thing is all very well, but you'd think they'd have taken more precautions. Built a trench, made some Molotovs. Something more than the trees. Ok, earlier on they did have more spare people to kill and move away zombies, but the numbers had been building up for some time.
Anyway, I did enjoy the episode!