Initial reaction: not sure how to feel. It was respectable, and yet felt lacking somehow.
I'm glad we got closure on everything, and I think they made some interesting points on "Talking Bad" (which was more bearable than most, probably because the ratio of other people talking to Chris Hardwick was unusually high -- I don't know what it is, maybe he can't help how his face looks, but he seems like he's always mugging/grinning for the camera and *god* he is a gigantic nerd goofball, and I don't mean that in a good way) about the showdown and why Jesse didn't shoot etc.
Maybe because it was too obvious that he was going around tying off loose ends. I didn't mind the slowness of Granite State because the point of that episode was the downward spiral of Walt's mental state of mind, and setting up the finale, but the first 30-45 minutes or so of Felina seemed like he was going around ticking off checkboxes.
Still, all in all an amazing series. I already pre-ordered my Bluray set :-) There was a link to a 10% off coupon on their Facebook page last week or so; they didn't make it obvious but you fill out a sweepstakes or something and you get the 10% coupon code in email. Although I think the sweepstakes might have been to attend the final Talking Bad in person or something so it may no longer be running.