For me, this episode was one of those that sort of just sit in the middle and do nothing but slowly advance storylines. Sure, it was well-written (Mad Men has a great way of throwing in little bits and pieces of dialogue that illuminate characters in ways that entire episodes of other shows cannot) but it didn't seem to move at the same pace the last few episodes have. For some reason, I didn't exactly feel as enamored with Don's obsession with Rachel or Midge as I usually do. It felt pigeonholed in. Also, I'm not sure how I feel about these episode-to-episode advertising plots. Besides Rachel Menkin, how important is any of this other stuff?
I do like the idea of Peggy moving her way up through Sterling-Cooper. She always did seem different than the rest of the secretaries and women in the show and it'll be interesting to see how she progresses throughout the show. It's also interesting to see Joan being involved with Roger. Roger seems to be somewhat obsessed with her while Joan clearly isn't getting what she wants out of the relationship. Once again, this seems like a story that will have plenty of time to unfold.
The only thing I'm worried about is that there's too many stories floating around. There's a lot of stuff going around that could easily get tangled up.. just look at Big Love for what happens when a show runs out of control. And while I can see the merit in this show, I'm still not convinced it's the best show out there. But still, it's great television and is worth following.