I thought it was pretty good for the most part, but the pacing was a little off. It didn't give itself room to breathe, like it was matching the pace of, say, season 1 episode 5, when it should really just calm down and develop the characters so that when the climax of the episode happens we actually care. In the end that made the choice to save the guy with bad trigger discipline or his uncle (which is essentially what I remember about those characters, they basically tried to develop both of their entire characters on the way to their deaths) a little bit less personal or based on who I liked better. Thankfully it was a bit of a multithreaded choice, since I liked the uncle more but I saved the other guy instead. Because as far as I could see, the uncle was already bitten on his leg, so in my fast thinking I decided to make sure the guy that wasn't already doomed was safe. And that makes it work a little better, although it's still not fantastic. On the other hand, I'm kind of excited for how this will play out; they already did the whole carly/doug trick, but they can't do that again because a good chunk of us are already onto them. We're expecting them to kill off the character we saved asap to make us feel small and meaningless, and since their personalities in this case are a LOT more distinct (to the point where it would be difficult to set them up with the same death scene like carly/doug got) I think they might do something different with them; perhaps the uncle will die quickly from his bite, but the other guy will survive for a while longer, possibly even get a full character arc since as he is now he's screaming for one (if he dies a klutz I will be very disappointed.)
On the other hand, it did one thing very very very well. It got me into playing as clementine. This is the episode's best accomplishment by far. At the beginning, it puts you in situations where you really feel like a helpless little girl; helpless to save omid from the robber, helpless to save christa from whoever those guys were, etc... but once you're alone, you slowly get more and more confident, and by the end you're stealthing around the house to stitch your own wound like a bad ass.