I just finished episode 4, and it did live up to my high expectations. Aside from a few technical problems of the game randomly locking up and the audio and video desyncing, especially at the end, it ran smoothly from start to the epic finish.
The puzzles overall were of a similar difficultly level seen in the other three episodes, and many of the little details that Cordelia commented on were nice, since they served to humanize her a little more.
Some of the more interesting and odd moments came near the end, and are in the spoiler below. (Don't say I didn't warn you.)
Aside from my problem of trying to think too much into it, I did see it coming at the end where
Overall, a great finish to a great game, and hopefully there will be a season two coming with the further adventures of Erica Reed.