The first time I watched the episode I was so-so about it however when I watched it again I liked it a lot more. The best part of the episode for me was just seeing the city again and did you notice the shot at night when Daryl and Carol are driving in the car is the same place that Rick went past in season 1 (one of my favourite images from the show).
I initially felt the flashbacks aside from the beginning one were pointless as we had already seen it before but watching it again I understand they were building the episode around the symbolism of fire, with Carol around the fire in the past and Daryl lighting the fires in the present. This was summed up well in the conversation Carol had talking about Ed and Sophia where she basically says that part of her has been burned away.
The only part of the episode I didn't like was everything to do with the van. It was bad enough that they both decide to go in the van putting more weight on it to potentially fall over, they then wait until the last second to get out giving them no chance of beating the walkers before jumping back inside. Daryl redeems himself however by becoming the best driver in history. The directing of the van falling scene was ridiculous, half-way down it's falling on its roof and then the camera pans away and suddenly it lands on all 4 wheels.
Overall good episode but from the promo it looks like everyone is back next week and it will be good to hopefully get some action because although the last 3 episodes haven't been bad I don't think anyone can argue that it has killed he momentum the first three of the season created.