I just watched it online, and though it was ok. I think there were better one hour climactic episodes over the years. Now will Modern Family and Parks & Rec that do the similar mockumentary type format have the same type of wrap-up, acknowledging it was filmed the whole time when those end?
I was surprised to see Joan Cusack guest star. She's a movie star, rather than a TV actress. I agree with the Toby comment. It's like they overcharacterized him esp during the later years of the show. From an annoying HR person,they made him a very unlikeable loser for life, while Angela became more ordinary and less mean, uptight and xenophobic over the years.
Seeing Kelly on The Office again kind of makes me think The Mindy Project is practically a spinoff of The Office except she has a better job as a doctor and her name is Mindy there instead of Kelly. But, she acts the same way and personality between characters (e.g. thinking the name "Drake" is cool) is pretty much the same.