I finished Episode 4, and I PROMISE not to post any spoilers in this thread. It is EASILY the best episode so far, and the longest with the most difficult decisions, and EVERY single decision you made in EVERY episode will matter.
Now that I finished it I regret a lot of the decisions I made in episode 2 and episode 3 because they have a huge effect on episode 4.
I know a lot of people are complaining about how they won't have the episode for a while. Take the time to rewind and fix any decisions you aren't happy with.
Also, to all those idiots saying "your decisions don't matter" and "ending will be the same no matter what" have NO idea what they're talking about. Every decision you make matters and now I see that. Every decision you make in this episode will have SERIOUS consequences leading into the next episode and they were SO right when they said all your past decisions come into play.
Take your time when your playing, and think things through!! And enjoy!
Game of the year, HANDS DOWN!